Medical Licensing (MD/DO) · Independent exam preparation
European Diploma in Advanced Critical Care Echocardiography (EDEC): Free Preparation Guide Study Guide
Practise Doppler calculations, shock phenotyping, ventricular assessment and urgent valve, pericardial and aortic decisions for ESICM's advanced EDEC diploma.
By CertMedbry · Updated 20 October 2026
Learn to choose reliable measurements, distinguish competing causes of shock and connect echocardiographic findings to haemodynamic decisions in critically ill adults. This selective guide develops 60 concepts across TTE, TEE, ventricular function, valves and cardiovascular emergencies. The full scope remains the ESICM curriculum and its referenced advanced critical care echocardiography syllabus; these concepts do not replace that outline, supervised scanning or comprehensive case review.
Try 20 free practice questionsWhat is the exam format?
Check the question types, timing and outline before planning your revision.
Which credential and pathway does this guide cover?
The European Diploma in Advanced Critical Care Echocardiography awarded by ESICM, covering adult intensive care TTE and TEE. The handbook cover shortens the name to European Diploma in Advanced Echocardiography; the issuer page uses the expanded critical care name. These identify the same EDEC pathway. TOE and TEE are alternative abbreviations for transoesophageal echocardiography. EDEC is an advanced professional diploma rather than an initial medical licensing examination.
EDEC — ESICM · EDEC Guidelines — currently linked 2026 document
What are the question counts, durations and item styles?
The currently linked handbook specifies Part I as 50 single-best-answer questions in 90 minutes, with no negative marking. Part II contains 10 clinical cases with three four-option single-best-answer questions per case: 30 questions in 60 minutes. Case clips and loops repeat for six minutes per case. Part III is a 20-minute, one-to-one mannequin TOE assessment of practical skill, image quality and interpretation. The three parts require separate passes.
Are scored and pretest counts, passing scores or adaptive delivery specified?
Part II assigns one point to each of its 30 questions. The current handbook does not identify a separate unscored or pretest allocation, publish a numerical passing threshold, or describe computer-adaptive testing. Its Part II section specifies online delivery with calculators available; Part III is onsite. Online delivery should not be interpreted as permission to take the examination remotely from home.
Which handbook version governs the format described here?
The ESICM-linked document verified on 19 October 2026 has the filename EDEC_Guidelines_2026_updated_07_07_2026.pdf but displays Updated version – 03/30/2026 internally. No separate effective date is stated. The earlier March-path document describes five true/false statements per Part I question; that historical description is superseded for this guide by the currently linked handbook's 50-question SBA format.
EDEC Guidelines — currently linked 2026 document · EDEC Guidelines — earlier March 2026 document
Is there an official percentage-weighted blueprint?
No topic percentages are stated in the handbook or current ESICM course programmes. The handbook references the 2014 advanced critical care echocardiography consensus syllabus. Current ESICM learning objectives and the October 2026 advanced-course programme corroborate clinical breadth. This guide distributes concepts and drills for educational coverage without assigning examination weights. The complete issuer curriculum remains the authority for scope.
EDEC Guidelines — currently linked 2026 document · Advanced Course in IC Echocardiography — ESICM · Advanced Course in Intensive Care Echocardiography — 10–11 October 2026
What distinguishes eligibility to sit the examination from diploma completion?
Entry requires recognised intensivist status, a basic echocardiography course within the preceding two years, and appropriate mentor and supervisor arrangements. Examination eligibility includes the mandatory advanced course and at least 30 TTE plus 10 TEE reports with the required validation. Diploma completion requires 40 educational points, a validated logbook of 100 TTE and 35 TEE studies, and passes in all three examination parts. Passing the examination alone does not complete the diploma.
EDEC — ESICM · EDEC Guidelines — currently linked 2026 document
How should these practice questions be used?
Use the 20 original four-option questions as independent knowledge and interpretation drills. They do not reproduce the official case-loop presentation or mannequin OSCE and do not predict a passing result. Pair them with supervised image acquisition, timed interpretation of complete studies and practical TOE rehearsal.
EDEC is ESICM's advanced professional diploma for independently practising intensivists with basic critical care echocardiography competence. It combines adult TTE and TEE. This independent educational guide uses seven organisational domains drawn from verified ESICM objectives; ESICM has not published percentage weights for those domains.
Outline used: Verified on 2026-10-10 against ESICM's currently linked EDEC Guidelines, filename EDEC_Guidelines_2026_updated_07_07_2026.pdf, whose internal version label remains 03/30/2026. No separate effective date is stated. Clinical scope was corroborated against ESICM's 10–11 October 2026 advanced-course programme and published learning objectives. The handbook references the 2014 advanced critical care echocardiography consensus syllabus, whose full text was inaccessible. The workbook's shortened European Diploma in EchoCardiography label maps to ESICM's European Diploma in Advanced Critical Care Echocardiography; the assigned slug is preserved.
60 key concepts: understand, apply and avoid the traps
Work through the questions by exam domain. Explain the answer in your own words, try the example, then check the common pitfall.
Technical imaging and Dopplernot stated
1.How does Doppler alignment change a measured velocity?
Doppler measures the component of blood velocity parallel to the ultrasound beam: measured velocity equals true velocity multiplied by the cosine of the insonation angle. Increasing misalignment therefore underestimates velocity, with additional error when velocity is squared to estimate pressure gradients. Seek a window that makes the beam nearly parallel to flow. A weak, incomplete spectral envelope should trigger acquisition improvement before physiological conclusions or comparison with previous measurements.
Apply it
A suspected aortic stenosis jet measures 3.2 m/s apically but 4.1 m/s from a right parasternal window with a complete envelope. Use the highest reproducible, correctly identified velocity when assessing obstruction, rather than averaging the two windows.
Common pitfall: Increasing gain cannot recover the velocity component lost through beam misalignment. A brighter spectrum may still substantially underestimate the true jet velocity and derived gradient.
Recommendations for Quantification of Doppler Echocardiography
2.When should pulsed-wave or continuous-wave Doppler be selected?
Pulsed-wave Doppler samples a selected depth, allowing localisation of flow such as the LV outflow tract, but aliases above its Nyquist limit. Continuous-wave Doppler measures high velocities without that limit but receives signals along the entire beam and cannot localise their depth. Choose pulsed-wave sampling for spatially defined flow and continuous-wave recording for high-velocity stenotic or regurgitant jets. Use two-dimensional and colour imaging to identify the intended signal.
Apply it
During aortic stenosis assessment, obtain LVOT velocity-time integral with pulsed-wave Doppler proximal to flow acceleration. Record the transvalvular jet with continuous-wave Doppler. These measurements represent different flow locations and serve different roles in the continuity equation.
Common pitfall: A continuous-wave trace through several jets can combine signals. The highest velocity is useful only after confirming which anatomical flow produced the recorded envelope.
Guidelines for Performing a Comprehensive Transthoracic Echocardiographic Examination in Adults · Recommendations for Quantification of Doppler Echocardiography
3.Why does spectral aliasing occur?
Pulsed-wave Doppler aliases when the measured frequency shift exceeds half the pulse repetition frequency, causing the spectrum to wrap across the baseline. Increasing the velocity scale or reducing sampling depth can increase the measurable range. Baseline shifting changes display allocation but does not create a higher underlying Nyquist limit. If the clinical target is genuinely high velocity, continuous-wave Doppler usually provides the appropriate measurement rather than repeatedly adjusting a limited pulsed-wave display.
Apply it
An LVOT trace wraps after the sample volume is advanced toward a stenotic aortic valve. Move the sample back to a clean proximal flow site. Use continuous-wave Doppler separately to measure the high-velocity valvular jet.
Common pitfall: Aliasing is a sampling limitation, not proof of severe disease. Normal flow can alias when the selected scale is low or sampling conditions are unfavourable.
Recommendations for Quantification of Doppler Echocardiography
4.How should image settings be adjusted before measuring chambers?
Reliable measurements require clear borders and appropriate temporal resolution before tracing begins. Reduce unnecessary depth and sector width, place the focal zone near the structure of interest, and adjust gain to preserve the blood–tissue interface without filling the cavity with noise. A higher transducer frequency improves resolution when penetration remains adequate. Optimise each view separately because settings suitable for a deep apical chamber may obscure a superficial valve or fast-moving leaflet.
Apply it
An apical study shows a small heart occupying one third of the image and indistinct endocardium. Reduce depth, narrow the sector and adjust focus and gain before tracing ventricular volumes or judging regional wall motion.
Common pitfall: Post-processing cannot reliably restore an endocardial border never captured. Precise-looking calipers do not compensate for poor acquisition, excessive gain or an unsuitable imaging plane.
Guidelines for Performing a Comprehensive Transthoracic Echocardiographic Examination in Adults
5.How can an apparent intracardiac structure be tested for artifact?
A real structure should have a plausible anatomical attachment and remain interpretable across independent imaging planes. Reverberation creates repeated echoes along the beam, while side-lobe and other artifacts can place false echoes within blood-filled spaces. Change the imaging window, angle and gain, and inspect motion relative to nearby reflectors. An apparent mass that disappears or moves inconsistently with anatomy needs verification rather than immediate attribution to thrombus, vegetation or dissection.
Apply it
A linear echo appears in the left atrium in one apical view but cannot be reproduced from another window. It maintains a fixed relationship to a bright reflector. Reassess settings and planes before labelling it a pathological membrane.
Common pitfall: Disappearance after changing one view does not alone prove artifact; a thin genuine lesion may also leave the imaging plane. Independent anatomical confirmation remains necessary.
Guidelines for Performing a Comprehensive Transthoracic Echocardiographic Examination in Adults · Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
6.What does a velocity-time integral measure?
Velocity-time integral is the distance travelled by a column of blood during one ejection period, obtained by tracing the systolic Doppler envelope. Multiplying VTI by the corresponding cross-sectional area estimates stroke volume. The measurement requires correct sample position, alignment and envelope tracing; it is not the same as peak velocity. Serial VTI can track changes in stroke volume when the measured outflow area and acquisition conditions remain effectively unchanged between observations.
Apply it
During a reversible preload test, LVOT VTI rises from 15 to 18 cm with unchanged sampling and similar heart rate. This represents a 20% increase in estimated stroke volume, assuming the LVOT area remains constant.
Common pitfall: Tracing a single unusually large beat in an irregular rhythm exaggerates output. Use representative beats and comparable acquisition conditions rather than selecting the most attractive envelope.
Recommendations for Quantification of Doppler Echocardiography
7.When is the simplified Bernoulli equation appropriate?
The simplified Bernoulli equation estimates an instantaneous pressure difference as 4v² when velocity is expressed in metres per second and the gradient in mmHg. It assumes the proximal velocity contributes little compared with the jet velocity. If proximal velocity is substantial, the fuller expression 4(v₂² − v₁²) is more appropriate. The result is an instantaneous pressure difference between two locations, not automatically a catheter peak-to-peak gradient or an absolute chamber pressure.
Apply it
A jet velocity of 4 m/s with negligible proximal velocity gives an estimated instantaneous gradient of 64 mmHg. If proximal velocity is 2 m/s, incorporating it reduces that estimate to 48 mmHg instead.
Common pitfall: Do not equate a Doppler peak instantaneous gradient with a catheter peak-to-peak gradient. They compare pressures at different moments and may differ even without measurement error.
Recommendations for Quantification of Doppler Echocardiography
8.Which anatomical clues distinguish normal right atrial variants from masses?
Normal right atrial structures can resemble pathology when seen incompletely. The Eustachian valve arises near the inferior vena cava, a Chiari network is typically thin and mobile, and the crista terminalis is a muscular ridge along the right atrial wall. Identify attachment, texture and continuity in multiple planes. These features help distinguish expected anatomy from a catheter-associated thrombus or vegetation, although clinical context and image quality still determine diagnostic confidence in an individual patient.
Apply it
TEE reveals a thin mobile filament arising near the inferior vena cava in a patient without bacteraemia or a right atrial catheter. Define its attachment in the bicaval view before deciding whether it represents a normal variant.
Common pitfall: Mobility alone does not establish vegetation. Conversely, recognising a common variant should not dismiss a separate new mass with a different attachment or compatible clinical evidence.
Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
TEE acquisition and safetynot stated
9.When does TEE add decisive information after TTE?
TEE brings the transducer close to posterior cardiac structures and often improves imaging when ventilation, dressings or body habitus limit transthoracic windows. It is particularly useful for detailed valve assessment, suspected endocarditis complications and selected aortic questions. Choose it when the expected information can change management and procedural risks are acceptable. A satisfactory TTE and a focused clinical question may make immediate TEE unnecessary; the two approaches provide complementary rather than interchangeable views.
Apply it
An intubated patient has persistent shock and poorly visualised mitral leaflets on TTE despite optimisation. TEE can define leaflet disruption, regurgitation and ventricular function, provided an oesophageal risk assessment does not identify a contraindication to probe placement.
Common pitfall: Mechanical ventilation does not itself justify TEE or remove oesophageal risk. Select the examination for an actionable unresolved question, rather than simply because the patient is intubated.
Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
10.Which oesophageal findings materially change TEE safety?
TEE requires passage through the oesophagus, so known perforation, obstructing stricture or other major oesophageal pathology can make probe insertion unsafe. Recent upper gastrointestinal surgery, bleeding history, varices and swallowing difficulty require an individual assessment rather than automatic routine passage. Clarify the lesion, urgency and alternative imaging options before proceeding. The distinction is between a potential diagnostic benefit and a mechanical risk that sedation or endotracheal intubation does not remove for the patient.
Apply it
A patient with shock has a documented tight oesophageal stricture and requires improved valve imaging. Avoid routine probe passage; optimise TTE and select another appropriate diagnostic route while discussing the structural oesophageal risk with relevant specialists.
Common pitfall: Treating every relative risk as an absolute prohibition can withhold useful imaging, but known obstruction should never be overcome by applying additional insertion force to the probe.
Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
11.How should resistance during TEE probe manipulation be handled?
Probe movement should be controlled, gentle and anatomically purposeful. Unexpected resistance requires stopping and reassessing position rather than advancing or rotating forcefully. Neutralise excessive tip flexion before major insertion or withdrawal movements, and avoid prolonged pressure at a single location. Continually account for airway security, haemodynamic tolerance and the patient's clinical state. Good image acquisition depends on coordinated depth, rotation and multiplane adjustment, not increasingly aggressive manipulation to force an ideal textbook view.
Apply it
During an ICU TEE, advancing toward a transgastric position meets unexpected resistance and the desired view remains absent. Stop advancement, reassess flexion and position, and obtain assistance rather than attempting repeated forceful passage of the probe.
Common pitfall: An excellent image does not justify unsafe probe pressure. Persisting against resistance can injure tissue even when the patient cannot report pain because of sedation.
Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
12.How do you acquire and recognise the mid-oesophageal four-chamber view and complementary TEE sections?
Under supervision, advance from the mid-oesophageal five-chamber view to approximately 30–35 cm until the mitral valve is clearly seen. Set the multiplane angle around 10–20° to remove the aortic valve and LVOT from the section; adjust imaging depth to include the LV apex. Identify both atria, both ventricles, the septa and both atrioventricular valves. Gentle retroflexion may improve apical alignment. For the bicaval section, use approximately 90–110° and turn the probe rightward until the SVC and IVC enter the right atrium alongside the interatrial septum. For transgastric mid-papillary short-axis imaging, advance gently into the stomach, anteflex for wall contact and adjust depth or flexion at approximately 0–20° until both papillary muscles appear within a nearly circular LV section.
Apply it
An apparent enlarged RV in the four-chamber section requires confirmation without obliquity. Complement it with right-heart views and the transgastric section to compare septal shape and regional contraction.
Common pitfall: Angles and insertion depths are starting points; anatomy varies. Confirm anatomical endpoints. Screen for contraindications, monitor the patient, release flexion before substantial advancement or withdrawal, and never force the probe against resistance.
Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
13.Why is the transgastric short-axis view useful?
A transgastric short-axis section at the mid-papillary level shows LV wall segments around the cavity and helps assess contraction, regional asymmetry and septal configuration. Correct level matters because basal, papillary and apical sections have different geometry. The RV and septum also provide clues to ventricular interaction. Interpret cavity size and fractional area change in context: a small vigorously contracting section may reflect low loading, while one apparently normal slice cannot exclude dysfunction elsewhere in the ventricle.
Apply it
After an intervention, a transgastric image appears more contractile but now cuts the ventricle closer to the apex. Reproduce the original mid-papillary level before judging a therapeutic improvement from the apparent change in cavity size.
Common pitfall: Comparing different ventricular levels creates false trends. Papillary muscles and consistent anatomical landmarks should anchor serial sections before changes in contraction are accepted as physiological.
Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
14.What does the bicaval TEE view clarify?
The bicaval view displays the superior and inferior vena caval entries into the right atrium and profiles the interatrial septum. It helps identify septal anatomy, venous structures and the relationship of devices to the right atrium. Appropriate rotation and multiplane adjustment are needed to bring the intended structures into the section. Combine two-dimensional imaging with colour Doppler when investigating interatrial flow, recognising that pressure relationships and ventilation can change the direction or visibility of shunting.
Apply it
A right atrial linear structure is difficult to localise in a four-chamber section. A bicaval view demonstrates its attachment near the inferior vena cava, helping distinguish a normal venous-associated structure from material attached to a central catheter.
Common pitfall: A single colour image without visible shunting does not exclude an interatrial communication. Flow depends on instantaneous pressure gradients, imaging alignment and the sensitivity of chosen settings.
Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
15.How can deep transgastric imaging improve outflow Doppler?
The deep transgastric approach can align the ultrasound beam more closely with LV outflow and aortic valve flow than many mid-oesophageal views. This supports LVOT pulsed-wave and aortic continuous-wave measurements when an adequate view is obtainable safely. Confirm the anatomical pathway and use a clean spectral envelope rather than assuming any strong signal is aortic flow. Reproducibility of alignment and sample position is especially important when using TEE to follow haemodynamic changes over time.
Apply it
A mid-oesophageal aortic view shows a stenotic valve, but its Doppler beam crosses flow obliquely. A safely obtained deep transgastric view yields a more complete, higher-velocity envelope and provides a better basis for quantitative stenosis assessment.
Common pitfall: Not every patient permits an ideal deep transgastric view. Forcing probe flexion to obtain alignment adds risk; alternative windows may provide safer, more reliable Doppler measurements.
Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
Left ventricular function and fillingnot stated
16.How is biplane LV ejection fraction calculated?
Biplane disk summation estimates LV end-diastolic and end-systolic volumes from properly acquired apical four- and two-chamber views. Ejection fraction equals end-diastolic volume minus end-systolic volume, divided by end-diastolic volume. The calculation expresses the fraction of chamber volume ejected, not cardiac output or intrinsic contractility alone. Correct endocardial tracing, timing and avoidance of apical foreshortening are essential. Compare serial results with attention to loading conditions, rhythm and acquisition quality rather than treating small numerical differences as definite change.
Apply it
An LV has an end-diastolic volume of 140 mL and an end-systolic volume of 84 mL. Stroke volume is 56 mL and EF is 40%; heart rate is still needed to calculate cardiac output.
Common pitfall: A normal EF can coexist with a small stroke volume when end-diastolic volume is low. Do not use preserved EF as proof of adequate systemic flow.
Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults
17.Why does apical foreshortening distort LV volumes?
Foreshortening occurs when an apical view misses the true apex, making the LV appear shorter and often more rounded. Volume estimates then exclude part of the chamber, and regional motion near the apex may be misrepresented. Move the transducer to obtain the longest anatomically credible LV axis rather than merely adjusting the tracing. Agreement between two similarly foreshortened views does not validate the measurement; acquisition quality must be established before applying the biplane volume formula.
Apply it
An apparent apical cap looks thick and the LV long axis is unexpectedly short. Move the transducer laterally and inferiorly as appropriate to recover the true apex before concluding that the cavity is small or apical contraction is normal.
Common pitfall: Tracing beyond the visible apex invents anatomy rather than correcting the image. Reacquire the view instead of compensating for foreshortening with an artificially extended contour.
Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults
18.How should regional wall motion be assessed?
Regional systolic assessment considers inward motion and myocardial thickening across standard LV segments in multiple views. Reduced motion alone may reflect translation, tethering or an oblique section, whereas impaired thickening strengthens evidence of regional dysfunction. Compare neighbouring segments and coronary distributions, but integrate ECG findings and clinical context before assigning a cause. Regional abnormalities can occur with ischaemia, prior infarction, stress cardiomyopathy and conduction-related dyssynchrony, so the echocardiographic pattern does not by itself establish an acute coronary diagnosis.
Apply it
A patient with new chest pain has reduced inferior-wall thickening in both apical two-chamber and short-axis views. The reproducible regional finding supports an ischaemic evaluation more strongly than an isolated motion abnormality seen in one off-axis section.
Common pitfall: Calling every hypokinetic segment acute infarction ignores prior scar and non-coronary causes. Establish whether the abnormality is new and whether the clinical findings support acute ischaemia.
Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults
19.Why can ejection fraction change without a change in contractility?
Ejection fraction depends on preload, afterload, ventricular geometry and valvular loading as well as myocardial contractility. Reducing arterial load can increase fractional emptying without restoring myocardial function, while increasing afterload can lower EF despite unchanged contractile capacity. Significant mitral regurgitation provides an additional low-pressure ejection route and may preserve EF despite impaired forward performance. Interpret serial EF alongside blood pressure, vasoactive support, forward flow and valve findings before attributing a difference to myocardial recovery or deterioration.
Apply it
A septic patient's EF falls after vasopressor support raises arterial pressure, while LVOT VTI and organ perfusion remain stable. Consider the changed afterload before diagnosing a new decline in intrinsic myocardial function from EF alone.
Common pitfall: A hyperdynamic ventricle is not synonymous with adequate circulation. Small cavity volume, vasodilation or regurgitant ejection can coexist with a high EF and inadequate forward output.
Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults · Recommendations for Noninvasive Evaluation of Native Valvular Regurgitation
20.What makes longitudinal strain useful and load sensitive?
Global longitudinal strain quantifies myocardial deformation along the LV long axis and may identify impaired longitudinal shortening despite preserved EF. Longitudinal shortening is conventionally expressed as a negative value, so a less negative result indicates reduced shortening when acquisition and analysis are comparable. Strain remains sensitive to loading, image quality, tracking and software differences. Use it to supplement chamber volumes and clinical assessment, and compare serial studies using consistent views, equipment and analytical methods whenever possible.
Apply it
A patient has EF 58% but longitudinal strain is less negative than on a technically comparable previous study. Review blood pressure, tracking quality and regional patterns before interpreting the change as evidence of altered myocardial performance.
Common pitfall: Comparing strain values across different software or poorly matched loading conditions can imply false deterioration. A precise numerical result does not guarantee reliable tracking or biological comparability.
Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults
21.How can the 2025 ASE pathways be used to estimate LV filling pressure in sinus rhythm and significant mitral annular calcification?
For eligible adults in sinus rhythm, begin with annular e′, E/e′ and pulmonary pressure. Figure 3 uses reduced average e′ ≤6.5 cm/s, increased average E/e′ ≥14 and PASP ≥35 mmHg; TR velocity ≥2.8 m/s substitutes when right atrial pressure cannot be estimated. All three abnormal findings support elevated mean left atrial pressure: E/A <2 indicates grade 2 dysfunction and E/A ≥2 grade 3. All three normal support normal resting pressure. Reduced e′ alone with E/A ≤0.8 supports grade 1 dysfunction with normal resting pressure. Other combinations require second-stage assessment: LA reservoir strain ≤18%, pulmonary-vein S/D ≤0.67 or LA volume index >34 mL/m² supports elevated pressure; IVRT ≤70 ms is an alternative. Check each measure's validity before applying its threshold. The general pathway excludes atrial fibrillation, severe primary MR, any mitral stenosis, moderate/severe annular calcification, mitral interventions, transplantation, LVAD, noncardiac pulmonary hypertension and constriction. It is not intended for children, normal pregnancy or intraoperative assessment.
Apply it
An eligible patient has average e′ 5 cm/s, average E/e′ 16, PASP 42 mmHg and E/A 1.3: the three initial abnormalities support elevated pressure and grade 2 dysfunction. If E/e′ were 11, use the second stage; technically valid LA reservoir strain of 16% supports elevated pressure. Missing or unreliable additional measurements may leave pressure indeterminate.
Common pitfall: Moderate/severe annular calcification can mechanically increase E and reduce e′. With interpretable sinus-rhythm inflow, E/A <0.8 usually supports normal pressure and >1.8 elevated pressure. For E/A 0.8–1.8, IVRT ≥80 ms supports normal pressure and <80 ms elevated pressure. Supporting data are limited. This E/A pathway cannot be applied in atrial fibrillation or when E and A are fused.
Evaluation of LV Diastolic Function and HFpEF Diagnosis — ASE 2025 Update
22.How should E/e′ be interpreted?
The E/e′ ratio combines early transmitral inflow velocity with early mitral annular tissue velocity to inform LV filling pressure assessment. It is useful because inflow reflects a pressure gradient while annular motion contributes information about relaxation, but neither component is independent of disease and loading. Annular calcification, regional abnormalities, valve pathology and acquisition errors can undermine interpretation. Use E/e′ within a validated, condition-appropriate multiparameter assessment rather than as a universal direct conversion to a precise filling pressure.
Apply it
A patient with a heavily calcified mitral annulus has low e′ and a high E/e′ ratio. Recognise that mechanically restricted annular motion may inflate the ratio, then seek additional condition-appropriate evidence before assigning elevated LV filling pressure.
Common pitfall: A high ratio is not automatically a measured wedge pressure. Treating it as an exact invasive value overlooks biological variability and conditions that distort annular motion.
Evaluation of LV Diastolic Function and HFpEF Diagnosis — ASE 2025 Update
23.How does atrial fibrillation alter Doppler interpretation?
Atrial fibrillation removes organised atrial contraction and creates variable cycle lengths, changing filling and stroke volume from beat to beat. A conventional E/A ratio is therefore unavailable, and isolated Doppler measurements may be unrepresentative. Use multiple suitable beats or a validated representative-beat approach, paying attention to preceding cycle lengths. Record the rhythm and rate, and avoid comparing a post-pause high-output beat with a short-cycle baseline when assessing function, valve severity or response to an intervention.
Apply it
During atrial fibrillation, LVOT VTI ranges from 10 to 19 cm across consecutive beats. Average suitable representative beats using consistent selection rules before assessing flow, rather than comparing the highest baseline beat with a low post-treatment beat.
Common pitfall: Respiratory-looking stroke-volume variation in an irregular rhythm may primarily reflect cycle-length variation. Do not interpret it automatically as a validated respiratory predictor of fluid responsiveness.
Evaluation of LV Diastolic Function and HFpEF Diagnosis — ASE 2025 Update · Recommendations for Quantification of Doppler Echocardiography
24.Why does mitral annular calcification complicate diastolic assessment?
Mitral annular calcification can restrict annular motion and alter transmitral flow, so low e′ or elevated inflow gradients may reflect local structural disease as well as myocardial relaxation and filling pressure. Inspect the annulus and leaflets before interpreting tissue Doppler. Significant calcification requires a condition-specific approach rather than unmodified use of routine E/e′ assumptions. Also assess whether associated mitral stenosis or regurgitation changes the haemodynamic meaning of the measurements and explains the patient's clinical presentation.
Apply it
An older patient has dyspnoea, a calcified mitral annulus, restricted basal leaflet movement and reduced annular velocities. Evaluate the transmitral gradient and valve lesion before attributing all abnormal Doppler findings to isolated myocardial diastolic dysfunction in this patient.
Common pitfall: Low annular velocity is not synonymous with impaired myocardial relaxation when the annulus itself is mechanically restricted. Ignoring visible calcification can misclassify both pressure and mechanism.
Evaluation of LV Diastolic Function and HFpEF Diagnosis — ASE 2025 Update
25.Which findings identify dynamic LV outflow obstruction, and why can it develop during septic shock?
Reduced preload makes the LV cavity smaller; reduced afterload promotes more complete emptying; increased contractile drive further narrows the systolic cavity and outflow tract. This combination can produce dynamic obstruction, sometimes with systolic anterior motion of the mitral valve. The prospective septic-shock study directly describes small hypercontractile ventricles, late-peaking obstructive Doppler signals and catecholamine exposure. Use colour Doppler to identify acceleration and move the pulsed-wave sample progressively through the cavity and LVOT to localise its onset. Aligned continuous-wave Doppler can then demonstrate the characteristic late-peaking, dagger-shaped systolic envelope.
Apply it
A hypotensive patient receiving dobutamine has a small hyperdynamic LV, mitral systolic anterior motion and subaortic acceleration. These findings support dynamic obstruction. Reassess excessive inotropic stimulation and reduced filling, considering fluid tolerance before a preload intervention, and repeat Doppler after treatment.
Common pitfall: Septic-shock obstruction may be mid-ventricular rather than strictly LVOT. Localise it before naming the mechanism. Mitral regurgitation can contaminate an apical continuous-wave recording; compare jet direction, timing and the acceleration site before calculating an outflow gradient.
Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults · Recommendations for Quantification of Doppler Echocardiography · Client Challenge
Shock and haemodynamic assessmentnot stated
26.How is forward cardiac output calculated from LVOT Doppler?
Forward stroke volume equals LVOT cross-sectional area multiplied by LVOT VTI, and cardiac output equals stroke volume multiplied by heart rate. For a circular LVOT, area is π times diameter squared divided by four. Use centimetres for diameter and VTI to obtain millilitres per beat, then convert millilitres per minute to litres per minute. The calculation requires matched anatomy and sampling, and its systemic interpretation needs caution when regurgitation or shunting separates measured forward flow from effective output.
Apply it
Assume a circular LVOT diameter of 2.0 cm, VTI of 20 cm and heart rate of 80/min without relevant regurgitation or shunting. Area is approximately 3.14 cm², giving stroke volume 63 mL and output 5.0 L/min.
Common pitfall: Peak velocity cannot replace VTI in the stroke-volume equation. Peak speed describes one instant; VTI incorporates the duration and changing velocity of the entire ejection period.
Recommendations for Quantification of Doppler Echocardiography
27.Why does LVOT diameter error have a disproportionate effect?
The LVOT diameter is squared when calculating a circular cross-sectional area, so small diameter errors produce larger errors in stroke volume and cardiac output. An incorrect anatomical level, oblique caliper placement or poorly defined border can therefore dominate an otherwise careful VTI measurement. Acquire and measure the diameter consistently at the appropriate site. For a short serial intervention, relative VTI change can track stroke-volume change without repeatedly introducing diameter measurement noise, provided the effective outflow area remains unchanged.
Apply it
A recorded LVOT diameter changes from 2.0 to 2.2 cm between immediate measurements. Area increases by about 21%, even if VTI is identical. Review acquisition before reporting a comparable improvement in stroke volume or cardiac output.
Common pitfall: Averaging several poorly placed diameter measurements does not remove systematic error. Improve the anatomical section and border definition before relying on the resulting calculated area.
Recommendations for Quantification of Doppler Echocardiography
28.How should passive leg raising be performed and interpreted using LVOT VTI?
Record baseline LVOT VTI with the patient semi-recumbent, with the trunk elevated approximately 45°. Then lower the trunk to supine while elevating the straight legs approximately 45°. Maintain probe position, Doppler alignment and sample location; keep ventilator and vasoactive settings unchanged. Capture the maximal transient VTI response promptly: the cited PLR study observed its echocardiographic peak within 90 seconds. Average representative beats; that protocol averaged five measurements. Calculate percentage change as 100 × (peak VTI − baseline VTI)/baseline VTI. With unchanged outflow area, VTI tracks stroke-volume change. The cited protocol found an approximately 13% increase predictive of fluid responsiveness. Thresholds around 10–12.5% used elsewhere are protocol dependent and particularly vulnerable to measurement error. Return to the original position and document recovery.
Apply it
VTI increases from 16 to 19 cm, an 18.75% rise, then returns to 16 cm. This exceeds the cited protocol's threshold and supports preload responsiveness. Congestion and the clinical need for increased flow still determine whether fluid is appropriate.
Common pitfall: The precision study found a median same-operator between-examination VTI least significant change of 11%, with substantial variation. Probe repositioning, inconsistent beat selection or a borderline response therefore weakens confidence. Repeat a technically doubtful manoeuvre; blood-pressure change alone cannot replace flow measurement.
Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults · ESICM 2025 Shock and Hemodynamic Monitoring Guidelines — Visual Abstract · Client Challenge · Client Challenge
29.Which conditions limit respiratory variation as a fluid-response test?
Respiratory changes in stroke volume arise from heart–lung interactions, but their interpretation depends on rhythm, ventilator conditions and ventricular function. Spontaneous effort, irregular rhythm, low tidal volume and significant RV dysfunction can weaken or change the relationship between variation and preload responsiveness. Establish the assumptions of the chosen test before interpreting its magnitude. When those assumptions do not fit, a reversible test such as passive leg raising with direct flow measurement may provide a more appropriate assessment.
Apply it
A patient with atrial fibrillation is triggering most ventilator breaths and has variable arterial pulse amplitude. Prefer a properly performed passive leg raise with representative flow measurements over interpreting the respiratory pulse variation as a validated fluid-response signal.
Common pitfall: A large respiratory variation is not universally a request for fluid. It can reflect RV afterload sensitivity or irregular breathing rather than correctable preload dependence.
Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults · EDEC Clinical Case Course — Advanced Hemodynamic Assessment
30.Why is IVC size insufficient to predict fluid responsiveness?
Inferior vena cava size and respiratory behaviour reflect interacting influences from right atrial pressure, intrathoracic pressure, abdominal pressure and venous compliance. They do not directly reveal where the ventricles lie on their preload–stroke-volume relationship. A dilated IVC may accompany right-heart disease or positive-pressure ventilation, while inspiratory collapse may reflect strong respiratory effort. Use IVC findings as contextual evidence and combine them with cardiac imaging and a suitable dynamic flow test when deciding whether preload augmentation will increase output.
Apply it
A ventilated patient has a large IVC and low LVOT VTI. Assess RV size, function and ventilator effects before concluding that the patient is adequately filled or that low flow must be caused by LV systolic failure.
Common pitfall: Equating a small IVC with fluid need confuses a pressure-related observation with a treatment decision. Responsiveness, perfusion need and tolerance must each be considered separately.
Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults · Echocardiographic Assessment of the Right Heart in Adults — ASE 2025
31.How do fluid responsiveness and fluid tolerance differ?
Fluid responsiveness means that increasing preload produces a meaningful rise in stroke volume or cardiac output. Fluid tolerance concerns whether added volume can be accepted without clinically important congestion or other harm. A patient may be responsive yet already have pulmonary oedema, high right-sided pressures or severe valve disease. Integrate the flow response with evidence of perfusion need and congestion. This separates a physiological capacity to increase output from a justified decision to administer additional fluid.
Apply it
Passive leg raising increases VTI, but the patient also has worsening oxygenation, severe mitral regurgitation and pulmonary congestion. Recognise preload responsiveness while reassessing whether a fluid bolus offers a favourable balance of flow benefit and congestion risk.
Common pitfall: Treating a positive dynamic test as a mandatory fluid order ignores tolerance. The test predicts a flow response, not a guaranteed improvement in patient outcome.
ESICM 2025 Shock and Hemodynamic Monitoring Guidelines — Visual Abstract · Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults
32.How can echocardiography distinguish septic shock phenotypes?
Septic shock can combine vasodilation, altered loading, LV dysfunction, RV dysfunction and dynamic obstruction in different proportions. Echocardiography identifies these contributors through ventricular size and function, forward flow, valve findings and pericardial assessment. A hyperdynamic LV does not exclude inadequate output, and reduced EF does not by itself establish the dominant cause of hypotension. Integrate imaging with arterial pressure, perfusion findings and treatment conditions, then repeat assessment when the clinical state or haemodynamic support changes.
Apply it
Two septic patients have similar arterial pressures. One has a small hyperdynamic LV with low VTI; the other has a dilated poorly contracting LV and a congested RV. Their shared diagnosis does not imply identical haemodynamic mechanisms.
Common pitfall: Naming septic cardiomyopathy from one low EF overlooks afterload and pre-existing disease. Establish context and serial behaviour before attributing the entire shock state to myocardial dysfunction.
Learning Components — ESICM · Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults
33.How should serial echocardiographic measurements be compared?
A serial measurement is most informative when acquisition, rhythm and relevant loading conditions are documented and comparable. Reproduce the view, Doppler sample position, tracing method and beat-selection approach, and record changes in ventilation or vasoactive support. Interpret measurement uncertainty before declaring a small difference clinically meaningful. Combine the imaging change with perfusion and congestion responses so that an intervention is judged by its haemodynamic effect rather than a single improved number without supporting clinical context.
Apply it
After a fluid bolus, VTI appears to rise slightly, but the second trace uses a different window and a post-pause beat. Reacquire representative matched recordings before concluding that the intervention increased forward stroke volume in this patient.
Common pitfall: More decimal places do not reduce acquisition variability. A small numerical difference can be less persuasive than a reproducible directional change with concordant clinical findings.
Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults · ESICM 2025 Shock and Hemodynamic Monitoring Guidelines — Visual Abstract
34.Why can increased airway pressure reduce cardiac output?
Positive intrathoracic pressure can reduce the gradient for venous return, while lung inflation may increase RV afterload and alter ventricular interaction. The resulting fall in LV filling or forward flow can therefore arise through more than one mechanism. Compare RV size and systolic performance, septal shape and LVOT flow before and after a ventilator change. A fall in output should not automatically be interpreted as isolated volume depletion, especially when new RV pressure loading is visible.
Apply it
After PEEP is increased, arterial pressure and LVOT VTI fall while the RV enlarges and the septum flattens. The findings suggest an adverse right-heart loading effect, prompting integrated reassessment of ventilation and circulation rather than reflex fluid administration.
Common pitfall: A higher measured central venous pressure during positive-pressure ventilation does not necessarily indicate greater effective preload. Intrathoracic pressure changes can raise measured pressure while reducing venous return.
Echocardiographic Assessment of the Right Heart in Adults — ASE 2025 · Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults
35.Which findings separate obstructive shock from primary pump failure?
Obstructive shock results from impaired filling or ejection caused by a mechanical constraint, such as tamponade or acute pulmonary vascular obstruction. Primary pump failure instead centres on inadequate myocardial performance, although both mechanisms may coexist. Examine the pericardium, both ventricles, septal geometry and valves rather than stopping after recognising low flow. The decisive pattern is the relationship between anatomy and haemodynamics: a low LVOT VTI establishes reduced forward flow but does not identify its cause by itself.
Apply it
A hypotensive patient has low LVOT VTI and a small LV, but the RV is acutely enlarged with systolic septal flattening. Evaluate pulmonary vascular obstruction or another RV afterload problem rather than diagnosing isolated LV pump failure.
Common pitfall: A small underfilled LV may be downstream of RV failure or tamponade. Assuming simple hypovolaemia can miss the mechanism and make empiric volume treatment misleading.
Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults · Echocardiographic Assessment of the Right Heart in Adults — ASE 2025
36.Why is a small hyperdynamic LV not enough to prescribe fluid?
A small vigorously contracting LV describes chamber appearance under current loading conditions. It can occur with reduced venous return, vasodilation, tachycardia, RV-mediated underfilling or dynamic outflow obstruction. These mechanisms do not all respond safely to the same intervention. Measure forward flow, examine the RV and outflow tract, and use a suitable dynamic preload test when indicated. Decide about fluid only after linking the image to perfusion need and assessing whether additional volume is likely to be tolerated.
Apply it
A tachycardic postoperative patient has near cavity obliteration in systole. Check for RV enlargement, pericardial constraint and dynamic LVOT acceleration, then assess preload responsiveness rather than treating the visual impression as sufficient evidence for a fluid bolus.
Common pitfall: Visual hypercontractility can conceal low stroke volume. Conversely, low cavity volume alone does not establish whole-body fluid depletion or exclude a mechanically important cause of underfilling.
Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults
Right ventricular function and pulmonary circulationnot stated
37.Why is an RV-focused apical view necessary?
The RV has a complex shape that is easily truncated or distorted in a standard LV-centred four-chamber section. An RV-focused apical view maximises appropriate right ventricular dimensions and improves assessment of the free wall and apex. Confirm that the section represents the chamber rather than an oblique cut before comparing size with the LV. Combine dimensions with systolic measurements and haemodynamic context because chamber enlargement alone does not distinguish chronic adaptation, acute pressure loading and volume loading.
Apply it
A standard apical view suggests a normal RV, but an RV-focused acquisition shows a wider basal cavity and impaired free-wall movement. Use the dedicated view and complementary measurements before excluding right-heart involvement in an unstable patient's shock.
Common pitfall: Changing transducer orientation can change the apparent RV/LV size ratio without a physiological change. Reproduce the intended section before interpreting serial chamber enlargement or recovery.
Echocardiographic Assessment of the Right Heart in Adults — ASE 2025
38.How should TAPSE be interpreted alongside S′ and fractional area change?
TAPSE measures longitudinal systolic displacement of the lateral tricuspid annulus using an aligned M-mode cursor in an RV-focused apical view. The 2025 reference limits define normal TAPSE as >1.7 cm, lateral tricuspid tissue-Doppler S′ as >9.5 cm/s and RV fractional area change as >35%. S′ measures peak systolic annular velocity. FAC is 100 × (end-diastolic area − end-systolic area)/end-diastolic area, using matched RV-focused sections. TAPSE and S′ primarily sample longitudinal function; FAC includes additional contraction components but omits the RV outflow tract. Agreement among these measures and visual findings increases confidence.
Apply it
TAPSE 1.3 cm, S′ 8 cm/s and FAC 30%, accompanied by RV enlargement and reduced free-wall motion, concordantly support RV systolic dysfunction. After cardiac surgery, TAPSE 1.2 cm with FAC 42% and stable forward flow is discordant: altered longitudinal mechanics reduce confidence in diagnosing severe global dysfunction from TAPSE alone.
Common pitfall: Loading, cardiac translation and postoperative contraction patterns affect these indices. Misalignment lowers TAPSE or S′, while foreshortening and poor endocardial tracing distort FAC. Recheck acquisition and use complementary measures; preserved annular motion does not establish normal global RV performance.
Echocardiographic Assessment of the Right Heart in Adults — ASE 2025
39.How should tricuspid annular S′ be interpreted?
Tissue Doppler S′ measures peak systolic longitudinal velocity at the lateral tricuspid annulus. Correct sample placement and alignment with annular movement are essential because off-axis acquisition underestimates velocity. Like TAPSE, S′ represents longitudinal basal behaviour rather than the entire RV contraction pattern and remains load sensitive. Use concordance with other RV findings to strengthen interpretation; disagreement should trigger review of technique, rhythm and clinical context rather than selection of whichever value best fits an initial impression.
Apply it
A low lateral tricuspid S′ is recorded with the Doppler beam crossing annular motion obliquely. Reposition for better alignment and compare the repeat value with TAPSE, RV area change and visible free-wall contraction before classifying systolic function.
Common pitfall: A low velocity obtained from poor alignment is not equivalent to impaired myocardium. Increasing spectral gain may improve visibility but cannot correct the missing axial velocity component.
Echocardiographic Assessment of the Right Heart in Adults — ASE 2025
40.How is RV fractional area change calculated?
RV fractional area change equals end-diastolic area minus end-systolic area, divided by end-diastolic area and multiplied by 100. Trace the RV endocardial border in an appropriate RV-focused view at the correct cardiac phases. FAC incorporates more of the visible chamber than an annular displacement alone, but remains a two-dimensional area measure that excludes portions of RV geometry. Border definition, trabeculations and an inconsistent section can introduce important error, so use FAC within a multiparameter assessment.
Apply it
An RV end-diastolic area is 30 cm² and end-systolic area is 21 cm². FAC is 30%. Review the reduced area change alongside chamber size, longitudinal indices and the clinical loading conditions rather than treating it as a complete diagnosis.
Common pitfall: FAC is not calculated by dividing end-systolic area by end-diastolic area. That ratio describes the remaining area fraction rather than the proportion lost during systole.
Echocardiographic Assessment of the Right Heart in Adults — ASE 2025 · Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults
41.How does septal timing distinguish RV pressure and volume loading?
In a short-axis view, septal flattening converts the LV from a circular cavity toward a D shape, reflecting altered interventricular pressure relationships. Flattening prominent during systole supports RV pressure loading, whereas predominant diastolic flattening favours volume loading. Severe or mixed disease can affect both phases, so timing is a clue rather than an exclusive rule. Interpret it with RV size, valve lesions, pressure estimates and the clinical setting, including ventilation and pulmonary vascular disease.
Apply it
A ventilated patient develops an enlarged RV and systolic septal flattening after worsening respiratory failure. This pattern supports increased RV pressure load and directs attention to pulmonary vascular and ventilator contributors rather than isolated chronic volume overload.
Common pitfall: Calling every D-shaped LV pulmonary embolism ignores other causes of RV pressure loading. The geometry identifies a loading pattern, not a unique pulmonary vascular diagnosis.
Echocardiographic Assessment of the Right Heart in Adults — ASE 2025
42.How is pulmonary artery systolic pressure estimated from TR, and when does severe TR invalidate the usual calculation?
With an adequately aligned, suitable tricuspid-regurgitation continuous-wave envelope, the modified Bernoulli equation estimates the RV–right atrial systolic gradient as 4v², with velocity in m/s and gradient in mmHg. Add an appropriate right atrial pressure estimate to obtain RV systolic pressure. This approximates pulmonary artery systolic pressure only without relevant RV outflow or pulmonary valve obstruction. Severe TR can produce rapid RV–RA pressure equalisation, an early-peaking triangular contour and truncation associated with a V-wave cutoff. This can underestimate the gradient and pressure. The 2025 guideline specifically cautions that Bernoulli cannot be applied to determine the RV–RA gradient when this cutoff is present.
Apply it
A suitable parabolic TR envelope peaks at 3.0 m/s, estimated right atrial pressure is 10 mmHg and there is no outflow obstruction: estimated PASP is 4 × 3² + 10 = 46 mmHg. A severe-TR signal with a V-wave cutoff does not support that calculation, even if its border appears clearly traced.
Common pitfall: A complete-looking envelope does not establish valid haemodynamic assumptions. Incomplete signals and uncertain right atrial pressure add error; absence of a measurable TR jet does not demonstrate normal pulmonary pressure.
Echocardiographic Assessment of the Right Heart in Adults — ASE 2025
43.Why is right atrial pressure estimation uncertain in ventilated patients?
IVC diameter and inspiratory behaviour can help estimate right atrial pressure under appropriate conditions, but positive-pressure ventilation changes the pressure transmission and respiratory pattern underlying those observations. Abdominal pressure and RV disease add further uncertainty. Avoid applying spontaneous-breathing assumptions mechanically to an intubated patient. Integrate venous findings with other right-heart information and available invasive measurements, and recognise that an uncertain right atrial pressure estimate also makes a calculated pulmonary artery systolic pressure less certain.
Apply it
An intubated patient has a dilated IVC with little respiratory change and a good TR envelope. Report the RV–RA gradient confidently if technically sound, while qualifying any absolute pulmonary pressure estimate that depends on an uncertain right atrial pressure.
Common pitfall: Assigning a precise right atrial pressure solely from IVC appearance during controlled ventilation creates artificial certainty. The resulting pulmonary pressure inherits that unsupported numerical assumption.
Echocardiographic Assessment of the Right Heart in Adults — ASE 2025
44.How does ARDS threaten RV performance?
ARDS can increase pulmonary vascular load through lung disease, hypoxic vasoconstriction and the haemodynamic effects of ventilation. The RV may dilate and fail, shifting the septum and reducing LV filling and systemic flow. Assess RV size, systolic performance, septal geometry and forward output together. Serial imaging around changes in respiratory status or ventilator settings can identify a circulation–ventilation interaction. The relevant finding is not simply elevated pulmonary pressure but whether the RV is coping with its current load.
Apply it
An ARDS patient develops hypotension with new RV dilatation, systolic septal flattening and falling LVOT VTI. Integrate these findings with oxygenation, carbon dioxide and ventilator settings when assessing the cause of deterioration and planning the next intervention.
Common pitfall: A seemingly normal LV does not exclude a cardiac contribution to shock. RV failure can limit systemic output primarily by reducing LV filling and altering ventricular interaction.
Echocardiographic Assessment of the Right Heart in Adults — ASE 2025 · Learning Components — ESICM
45.What can echocardiography establish in suspected pulmonary embolism?
Echocardiography can identify RV pressure loading, dysfunction and haemodynamic consequences compatible with significant pulmonary embolism, but these findings are not specific to embolism. Their interpretation depends on clinical probability, prior RV disease and the patient's stability. A normal echocardiogram does not exclude pulmonary embolism, particularly without major haemodynamic effects. Use the study to assess circulatory impact and competing causes of shock while selecting definitive diagnostic imaging appropriate to the patient's condition and the unresolved clinical question.
Apply it
A stable patient with pleuritic pain has a normal RV on TTE. Continue an appropriate pulmonary embolism diagnostic pathway if clinical probability warrants it; absence of RV strain does not rule out emboli without substantial haemodynamic effects.
Common pitfall: An isolated regional RV contraction pattern is not a definitive embolism diagnosis. Similar appearances can occur with other right-heart conditions and require clinical and imaging corroboration.
Echocardiographic Assessment of the Right Heart in Adults — ASE 2025
46.Which hepatic, portal and intrarenal venous Doppler patterns support systemic venous congestion?
Identify each vessel with colour Doppler before obtaining pulsed-wave recordings. Hepatic-vein S and D waves represent systolic and diastolic forward drainage toward the right atrium: systolic blunting means S is smaller than D, while systolic reversal is a severe abnormality. Portal pulsatility fraction is 100 × (maximum − minimum velocity)/maximum velocity over the cardiac cycle; 30% to <50% is mildly abnormal and ≥50% severely abnormal in the VExUS framework. Normal intrarenal venous flow is continuous; discontinuous systolic-plus-diastolic flow is abnormal, and diastolic-only flow is a severe pattern. Interpret these findings with IVC and cardiac assessment.
Apply it
A patient has hepatic systolic reversal, portal velocities ranging from 30 to 12 cm/s and diastolic-only intrarenal venous flow. Portal pulsatility is 60%. These concordant abnormalities support substantial venous congestion, especially with a dilated IVC and right-heart abnormalities.
Common pitfall: Severe TR, arrhythmia, liver disease and intrinsic renal disease can alter waveforms. The original VExUS study associated combined congestion findings with subsequent AKI after cardiac surgery; it did not establish that a particular diuretic or fluid-removal strategy improves outcomes. Congestion can coexist with preload responsiveness.
Echocardiographic Assessment of the Right Heart in Adults — ASE 2025 · EDEC Clinical Case Course — Advanced Hemodynamic Assessment · Client Challenge
Valve disease and endocarditisnot stated
47.How does the continuity equation estimate aortic valve area?
The continuity equation assumes conservation of systolic flow through the LVOT and aortic valve: valve area equals LVOT area multiplied by LVOT VTI, divided by aortic jet VTI. Measure the LVOT diameter carefully, sample proximal flow without including valvular acceleration, and acquire the highest reliable aortic jet velocity from suitable windows. Because several measurements contribute, a discordant area should trigger a technical review rather than immediate acceptance of a severe stenosis label without supporting anatomical and haemodynamic evidence.
Apply it
Assume LVOT area 3.0 cm², LVOT VTI 20 cm and aortic VTI 80 cm. Calculated valve area is 0.75 cm². Assess the result with jet velocity, mean gradient, flow state and measurement quality before classifying stenosis.
Common pitfall: Sampling the LVOT within flow acceleration raises LVOT VTI and can overestimate valve area. A technically consistent continuity equation requires anatomically appropriate proximal flow measurement.
Echocardiographic Assessment of Aortic Valve Stenosis — EACVI/ASE Focused Update
48.How is low-flow, low-gradient aortic stenosis classified and true severe disease distinguished from pseudo-severe disease?
Low flow is stroke-volume index <35 mL/m² and low gradient is mean gradient <40 mmHg. Together with valve area <1.0 cm², EF <50% defines the reduced-EF pattern; EF ≥50% identifies the preserved-EF pattern when flow is also low. First review Doppler alignment, LVOT diameter and VTI, blood pressure and calculated stroke volume. In reduced-EF cases, supervised low-dose dobutamine increases flow while valve area, velocity, gradient and stroke volume are reassessed. Opening to valve area >1.0 cm² supports pseudo-severe stenosis. Persistent area ≤1.0 cm² with augmented flow and velocity reaching ≥4 m/s or mean gradient reaching ≥40 mmHg supports true severe stenosis.
Apply it
Resting area 0.8 cm², mean gradient 25 mmHg, EF 30% and stroke-volume index 28 mL/m² meet the reduced-EF pattern. With dobutamine, increased flow and area 1.2 cm² support pseudo-severe disease; persistent area 0.8 cm² with mean gradient 43 mmHg supports true severe disease.
Common pitfall: A >20% stroke-volume increase indicates flow reserve in the cited guideline. Insufficient flow augmentation can leave severity unresolved: an unchanged low gradient under those conditions does not establish pseudo-severe disease. Preserved EF alone does not demonstrate normal forward flow.
Echocardiographic Assessment of Aortic Valve Stenosis — EACVI/ASE Focused Update
49.How do vena contracta and pulmonary venous flow help assess an eccentric mitral regurgitation jet?
An eccentric jet contacting the atrial wall can appear deceptively small because wall interaction changes its distribution and entrainment; colour area also depends on gain, scale and driving pressure. For a single jet, use a zoomed view showing proximal convergence, the narrow neck and downstream expansion. Measure vena contracta width perpendicular to the jet at its narrowest neck, just downstream from the orifice, with appropriate colour settings and confirmation in another plane. An appropriately measured width ≥0.7 cm supports severe MR. Pulmonary-vein systolic flow reversal is another strong severity sign; simple systolic blunting is less specific. Use colour guidance and pulsed-wave sampling within the vein to identify the systolic and diastolic components.
Apply it
A patient with chronic posterior leaflet flail has a wall-hugging anterior jet. The vena contracta measures 0.8 cm in a correctly aligned view, and pulmonary venous Doppler demonstrates systolic reversal. These support severe MR despite the modest distal colour area; quantitative findings and chamber response provide further corroboration.
Common pitfall: An oblique section or excessive colour gain can distort vena contracta width. A single width may inadequately represent a noncircular orifice, and widths from multiple jets should not simply be added. An eccentric jet may selectively reverse flow in the vein it enters, so examine additional accessible veins and integrate the entire study. Absence of reversal does not exclude severe MR.
Recommendations for Noninvasive Evaluation of Native Valvular Regurgitation
50.How are quantitative criteria integrated with PISA limitations in chronic primary mitral regurgitation?
For chronic primary MR, applicable quantitative criteria supporting severe regurgitation are effective regurgitant orifice area ≥0.40 cm², regurgitant volume ≥60 mL per beat and regurgitant fraction ≥50%. Regurgitant volume can be calculated as effective orifice area multiplied by MR VTI when that area appropriately represents the regurgitant period; regurgitant fraction is regurgitant volume divided by total LV stroke volume. The PISA method commonly assumes hemispheric convergence, with flow proportional to radius squared. Radius error, wall constraint, noncircular orifices and changing regurgitation during systole can therefore distort the result. Interpret quantitative measurements with valve mechanism, vena contracta, pulmonary venous flow and chamber response.
Apply it
In chronic holosystolic primary MR, technically suitable measurements give effective orifice area 0.45 cm² and MR VTI 150 cm: regurgitant volume is 67.5 mL. With total LV stroke volume 125 mL, regurgitant fraction is 54%. A vena contracta of 0.8 cm, pulmonary-vein systolic reversal and compatible LA/LV enlargement make the findings concordant for severe MR. Chamber enlargement supports chronic volume loading but is not a substitute for these severity findings.
Common pitfall: A precisely measured radius cannot rescue an unsuitable hemispheric model. Multiplying a peak single-frame orifice area by the full MR VTI can overestimate volume in late-systolic or otherwise dynamic MR. Volumetric calculations also inherit errors in their component measurements. Investigate discordance by checking timing, geometry, acquisition and loading rather than averaging incompatible grades or applying chronic primary-MR thresholds indiscriminately to secondary MR.
Recommendations for Noninvasive Evaluation of Native Valvular Regurgitation
51.Which clues distinguish acute severe mitral regurgitation from chronic disease?
Acute severe MR abruptly loads a left atrium that has not adapted through enlargement or increased compliance. Pulmonary oedema and shock can therefore occur with a normal-sized atrium and a nondilated LV. Major structural disruption, such as papillary muscle rupture with a flail leaflet, together with substantial regurgitation and its haemodynamic consequences can establish acute severe MR without chronic remodelling. A wall-hugging jet may appear small, and rapid LV–LA systolic pressure equalisation can reduce jet velocity and produce an early-peaking triangular continuous-wave envelope. A normal or high EF can conceal poor forward output because part of ejection enters the atrium.
Apply it
After myocardial infarction, a patient develops abrupt pulmonary oedema and hypotension. TEE identifies papillary muscle rupture, a flail mitral leaflet and an eccentric regurgitant jet; pulmonary venous systolic reversal and low LVOT forward flow corroborate the acute haemodynamic burden. This integrated pattern supports acute severe MR despite a normal-sized atrium, EF 65% and modest colour jet area.
Common pitfall: A flail segment identifies a mechanism but does not make every degree of MR severe. Establish the extent of regurgitation and concordant haemodynamic consequences. Do not require chronic LA/LV enlargement, a large colour jet or a high jet velocity to recognise an acute severe lesion.
Recommendations for Noninvasive Evaluation of Native Valvular Regurgitation
52.How can acute severe aortic regurgitation be recognised?
Acute aortic regurgitation suddenly loads a relatively noncompliant LV, allowing filling pressure to rise rapidly before substantial dilatation develops. Assess leaflet integrity, the aortic root, regurgitant flow and haemodynamic effects together. Rapid diastolic pressure equalisation may produce a short pressure half-time, but that measurement is influenced by ventricular and aortic properties and is not sufficient alone. Premature mitral closure can support severe acute physiology. Consider endocarditis or dissection when the structural and clinical context suggests them.
Apply it
A patient with abrupt dyspnoea has a nondilated LV, disrupted aortic cusp and prominent diastolic regurgitation. Evaluate for acute severe AR and its cause rather than requiring the enlarged LV expected after prolonged chronic volume loading.
Common pitfall: Pressure half-time alone cannot grade every AR lesion. Ventricular compliance, filling pressure and treatment alter pressure equalisation, so structural and additional Doppler findings remain essential.
Recommendations for Noninvasive Evaluation of Native Valvular Regurgitation
53.When does a negative TTE fail to exclude endocarditis?
TTE may miss small vegetations, prosthetic-valve infection and periannular complications, particularly when acoustic windows are poor. If clinical suspicion remains high or a complication must be defined, TEE offers improved structural assessment. Evaluate attachment, independent motion, valve destruction and regurgitation rather than identifying infection from a mobile echo alone. A negative study must be interpreted against pretest probability, image quality and lesion visibility; echocardiography contributes anatomical evidence but does not replace microbiological and clinical diagnosis.
Apply it
A patient with persistent bacteraemia and a prosthetic aortic valve has no visible vegetation on a technically limited TTE. Proceed to detailed TEE assessment when safe instead of treating the negative transthoracic image as exclusion of valve infection.
Common pitfall: A mobile valve strand is not automatically vegetation. Conversely, absence of a visible mass does not exclude infection when prosthetic shadowing or limited resolution conceals the lesion.
Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
54.Which findings suggest periannular infection or prosthetic dehiscence?
Endocarditis can extend beyond leaflets to produce periannular cavities, abnormal communications or loss of prosthetic attachment. TEE assessment should therefore examine surrounding tissue and paravalvular flow rather than search only for vegetations. Abnormal rocking of a prosthesis or new paravalvular regurgitation can indicate dehiscence, while a suspicious adjacent cavity needs anatomical and colour-flow definition. Multiple planes help distinguish a genuine complication from prosthetic artifact, and clinical evidence determines whether infection is the likely underlying cause.
Apply it
A febrile patient with a prosthetic valve develops a new paravalvular jet and abnormal prosthetic motion. Obtain detailed multiplane TEE assessment of the sewing ring and adjacent tissue rather than limiting the examination to whether a vegetation is visible.
Common pitfall: Prosthetic shadowing can hide pathology and also create false structures. A suspected complication needs corroboration in independent planes, with careful assessment of motion and associated flow.
Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
Pericardial and aortic emergenciesnot stated
55.How is pericardial fluid distinguished from pleural fluid?
Fluid location should be established anatomically rather than inferred from a dark space alone. In a parasternal long-axis view, posterior pericardial fluid typically lies anterior to the descending thoracic aorta, whereas pleural fluid lies posterior to it. Confirm the relationship in additional views and assess distribution, because loculated collections may not follow a simple circumferential pattern. The distinction matters when explaining haemodynamic effects or planning drainage; neither fluid appearance nor size alone establishes tamponade physiology in the patient.
Apply it
A posterior echo-free collection lies behind the descending thoracic aorta in the parasternal long-axis view. This favours pleural fluid. Search separately for pericardial fluid before attributing hypotension to tamponade or considering a pericardial drainage procedure.
Common pitfall: Treating every posterior dark space as pericardial effusion can misdirect management. Confirm anatomical boundaries rather than relying on a single image or the collection's apparent size.
Guidelines for Performing a Comprehensive Transthoracic Echocardiographic Examination in Adults
56.Why does effusion size alone not establish tamponade?
Tamponade occurs when pericardial pressure constrains cardiac filling enough to impair circulation. The haemodynamic effect depends on accumulation rate, pericardial compliance and intracardiac pressures, so a rapidly developing small collection can be dangerous while a larger chronic effusion remains tolerated. Integrate clinical haemodynamics with chamber compression, venous findings and respiratory interactions. Echocardiographic signs identify a physiological pattern, but the diagnosis requires their relationship to the patient's state rather than an isolated measurement of maximal fluid depth.
Apply it
A postoperative patient becomes hypotensive with a new modest pericardial collection and right-sided chamber compression. The small measured fluid depth does not exclude important tamponade, particularly when the clinical deterioration and impaired filling developed abruptly after surgery.
Common pitfall: Waiting for a large circumferential effusion can miss rapidly accumulating or loculated tamponade. Conversely, a large effusion without circulatory compromise does not itself prove tamponade.
Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults
57.How should right-sided chamber collapse be interpreted?
Pericardial pressure can compress a chamber when its internal pressure is lowest. Right atrial collapse occurs during atrial relaxation, usually near ventricular systole; RV free-wall collapse occurs in early ventricular diastole. Correlate inward wall motion with the ECG and valve opening and closure, using a suitably aligned M-mode recording when helpful. Brief right atrial inversion is less persuasive than collapse lasting more than one-third of the cardiac cycle, which strengthens concern for tamponade physiology. Elevated right-sided pressures can prevent collapse despite tamponade, while low intracardiac pressures can permit collapse without equivalent circulatory compromise.
Apply it
In a patient with an effusion, an ECG-correlated recording shows right atrial inversion for 40% of the R–R interval and RV free-wall indentation just after atrioventricular valve opening. These correctly timed, sustained findings strengthen concern for tamponade when accompanied by hypotension and other evidence of impaired filling.
Common pitfall: The one-third criterion describes right atrial collapse duration relative to the entire cardiac cycle, not one-third of systole. Absence of RV collapse does not exclude tamponade when RV pressure is high, including pulmonary hypertension. Hypovolaemia can make collapse easier to provoke. Integrate timing, duration, collection distribution, venous findings and the clinical circulation.
Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults
58.When are respiratory Doppler changes useful in tamponade assessment?
Tamponade accentuates ventricular interdependence, so respiratory changes in filling can become exaggerated. In a spontaneously breathing patient, inspiration tends to increase right-sided filling while reducing left-sided filling, producing reciprocal Doppler changes. Interpret these observations with chamber compression, venous findings and the clinical circulation. Mechanical ventilation, irregular rhythm and substantial respiratory effort alter the expected pattern, so standard spontaneous-breathing assumptions should not be transferred uncritically to every ICU patient or used as a solitary diagnostic test.
Apply it
A spontaneously breathing patient with an effusion has marked reciprocal respiratory changes in mitral and tricuspid inflow plus right-sided chamber collapse. These concordant findings strengthen concern for tamponade more than an isolated respiratory fluctuation without matching anatomical evidence.
Common pitfall: Large respiratory Doppler variation can have other causes, and positive-pressure ventilation changes the pattern. Do not diagnose or exclude tamponade using an unqualified single percentage threshold.
Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults
59.Why can postoperative loculated tamponade evade a routine TTE?
After cardiac surgery, blood or fluid may collect locally and compress a specific chamber rather than form a uniform circumferential effusion. Dressings, ventilation and altered anatomy can further limit TTE. The usual right-sided collapse pattern may be absent if compression is regional or affects left-sided structures. Investigate unexplained postoperative low output with deliberate assessment of posterior and localised collections; TEE may clarify an unresolved question when safe and feasible, especially when routine transthoracic views are inadequate.
Apply it
A patient develops unexplained low output after cardiac surgery despite a TTE report of no large circumferential effusion. Limited posterior views and persistent haemodynamic concern justify targeted reassessment for loculated compression, potentially using TEE to improve anatomical definition.
Common pitfall: A report of no large effusion is not equivalent to exclusion of postoperative tamponade. Regional clot and chamber compression require active anatomical assessment beyond standard fluid-depth measurements.
Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults · Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
60.Which TEE limitation matters when excluding acute aortic dissection?
TEE can rapidly define many thoracic aortic abnormalities and assess associated aortic regurgitation or pericardial complications. However, air in the tracheobronchial region creates an important blind area involving the distal ascending aorta and proximal arch. A negative examination therefore cannot exclude disease in every aortic segment. Assess any apparent flap in multiple planes to distinguish artifact, and select complementary imaging when suspicion persists or complete anatomical definition is required for the patient's diagnostic and treatment decisions.
Apply it
A patient with abrupt chest pain and pulse asymmetry has no flap in the adequately visualised TEE segments. Persistent concern still warrants complementary aortic imaging because the distal ascending aorta may lie within an important acoustic blind area.
Common pitfall: A technically good TEE is not synonymous with complete aortic visualisation. Neither a negative visible segment nor a single unconfirmed linear echo settles the whole diagnosis.
2022 ACC/AHA Guideline for the Diagnosis and Management of Aortic Disease
What to focus on during revision
The following are CertMedbry study suggestions. Use the official outline to check the full scope of your examination.
- Practise choosing a measurement that answers the clinical question: forward flow, ventricular performance, filling pressure, obstruction or congestion.
- Reconcile discordant data by checking acquisition, rhythm, loading and anatomical assumptions before assigning disease severity.
- Build TEE orientation and safe probe handling alongside interpretation; written knowledge cannot substitute for reproducible practical acquisition.
- Distinguish preload responsiveness from perfusion need and fluid tolerance, especially with RV failure, pulmonary congestion or major valve disease.
- Recognise acute lesions that lack chronic chamber remodelling, including severe regurgitation, rapidly accumulating effusion and postoperative regional compression.
- Study the complete ESICM curriculum beyond these selective concepts, including specialised ICU applications, procedure guidance, trauma and extracorporeal support.
A practical preparation plan
1. Map the full curriculum to clinical questions
Use the ESICM curriculum, advanced-course objectives and programme to build a coverage map. For each topic, identify the anatomical view, measurement, assumptions and haemodynamic decision it supports; add specialised applications not developed in this selective guide.
2. Establish reproducible acquisition
With your mentor or supervisor, rehearse complete TTE and TEE sequences. Explain orientation aloud, optimise each view and repeat measurements until you can recognise when a number is technically unreliable.
3. Work calculations from original measurements
Calculate LVOT stroke volume and output, percentage VTI change, EF, RV FAC, pressure gradients and continuity-equation valve area. State units and assumptions, then deliberately change one input to identify the dominant source of error.
4. Interpret complete haemodynamic cases
Review loops together with rhythm, ventilation, blood pressure and treatment conditions. Explain the dominant mechanism, an important competing mechanism, the evidence that separates them and what serial assessment would resolve remaining uncertainty.
5. Rehearse practical TOE under supervision
Practise safe manipulation, standard planes and targeted extensions from a clinical vignette. Require anatomical confirmation and explain image-quality limitations before offering quantitative interpretations.
6. Use drills to repair reasoning gaps
Answer the independent MCQs, explain why each distractor fails and revisit the relevant clinical reference. Use flashcards for mechanisms and boundary conditions, then return to images rather than relying on text recall alone.
Use your sample score as a starting point
The free set contains 20 original practice questions. It is a small learning sample, not an official examination or a validated pass prediction. Review each explanation and its source before moving to another topic.
Start the free sampleOfficial sources and updates
- EDEC — ESICM
- EDEC Guidelines — currently linked 2026 document
- EDEC Guidelines — earlier March 2026 document
- EDEC Examination — ESICM
- Advanced Course in IC Echocardiography — ESICM
- Advanced Course in Intensive Care Echocardiography — 10–11 October 2026
- Learning Components — ESICM
- EDEC Clinical Case Course — Advanced Hemodynamic Assessment
- International consensus statement on training standards for advanced critical care echocardiography
- Guidelines for Performing a Comprehensive Transthoracic Echocardiographic Examination in Adults
- Recommendations for Quantification of Doppler Echocardiography
- Guidelines for Performing a Comprehensive Transesophageal Echocardiographic Examination
- Recommendations for Cardiac Chamber Quantification by Echocardiography in Adults
- Evaluation of LV Diastolic Function and HFpEF Diagnosis — ASE 2025 Update
- Echocardiographic Assessment of the Right Heart in Adults — ASE 2025
- Echocardiographic Assessment of Aortic Valve Stenosis — EACVI/ASE Focused Update
- Recommendations for Noninvasive Evaluation of Native Valvular Regurgitation
- Guidelines for the Use of Echocardiography as a Monitor for Therapeutic Intervention in Adults
- ESICM guidelines on circulatory shock and hemodynamic monitoring 2025
- ESICM 2025 Shock and Hemodynamic Monitoring Guidelines — Visual Abstract
- 2022 ACC/AHA Guideline for the Diagnosis and Management of Aortic Disease
- Client Challenge
- Client Challenge
- Client Challenge
- Client Challenge
- Changes in stroke volume induced by passive leg raising in spontaneously breathing patients: comparison between echocardiography and Vigileo™/FloTrac™ device - PMC
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