Quiz ARDMS AE Adult Echocardiography Examination

Comprehensive and Detailed Explanation From Exact Extract:
Constrictive pericarditis is characterized by thickening and fibrosis of the pericardium which restricts
diastolic filling of the ventricles. Key echocardiographic features include a characteristic
interventricular septal "bounce" or shift during early diastole due to the abrupt cessation of
ventricular filling imposed by the rigid pericardium. This septal bounce reflects rapid early diastolic
filling followed by a sudden halt as filling pressures equalize, a hallmark of constriction physiology.
Additionally, Doppler studies show marked respiratory variation in mitral and tricuspid inflow
velocities (>25%), with an inspiratory increase in tricuspid inflow and a decrease in mitral inflow
velocity, reflecting ventricular interdependence caused by the noncompliant pericardium. The mitral
inflow typically shows a large E-wave with a small or absent A-wave and a steep deceleration slope,
but importantly these velocities vary significantly with respiration, which is not the case in restrictive
cardiomyopathy.
Hepatic vein Doppler often reveals a prominent a-wave and a deep y-descent with increased diastolic
flow reversal during expiration, indicating elevated right atrial pressures and constrictive physiology.
The inferior vena cava (IVC) is usually dilated and shows no inspiratory collapse (i.e., no normal
collapse with sniff test) because of elevated right atrial pressure and impaired venous return.
Therefore:
Option A is incorrect because mitral inflow in constrictive pericarditis shows significant respiratory
variation, not absence of it.
Option B is incorrect because the hepatic vein is typically dilated with abnormal flow patterns, not
normal size.
Option C is incorrect because the IVC is dilated and does NOT collapse normally with inspiration/sniff
in constrictive pericarditis.
Option D is correct because the interventricular septal bounce is a classic feature reflecting
ventricular interdependence and constrictive physiology.
These findings are summarized in the "Textbook of Clinical Echocardiography, 6e" (Catherine M. Otto,
MD), Chapter 10 (Pericardial Disease), pages 280–285, with key illustrations showing septal bounce,
Doppler inflow variations, hepatic vein flow patterns, and IVC findings in constrictive pericarditis. The
"Mayo Clinic criteria" for echocardiographic diagnosis also emphasize ventricular septal shift as a
critical feature, often combined with tissue Doppler annular velocity patterns and hepatic vein
diastolic flow reversal for high diagnostic accuracy.

Pulmonic stenosis is a congenital valve abnormality often seen in genetic syndromes with cardiac
manifestations. Among these, Noonan syndrome is the most frequently associated with pulmonic
stenosis. Noonan syndrome is a genetic disorder characterized by distinctive facial features, short
stature, and congenital heart defects, with pulmonic valve stenosis being the predominant cardiac
lesion. The stenosis is usually valvular and caused by dysplastic pulmonary valve leaflets, leading to
obstruction of right ventricular outflow.
Other syndromes listed do not typically present with pulmonic stenosis:
Turner syndrome is more commonly linked with bicuspid aortic valve and coarctation of the aorta,
not pulmonic stenosis.
Eisenmenger syndrome refers to the advanced phase of congenital heart defects with significant
pulmonary hypertension and is not a genetic syndrome.
Marfan syndrome is predominantly associated with aortic root dilation and mitral valve prolapse, but
not with pulmonic stenosis.
This association is well documented in adult echocardiography guidelines and texts, such as the
"Textbook of Clinical Echocardiography" by Catherine Otto, which clearly identifies Noonan syndrome
as the syndrome most commonly associated with pulmonic stenosis among congenital heart
defects【16:Chapter on Congenital Heart Disease†Textbook of Clinical Echocardiography, 6e】.

The first image shows a bullseye plot of global longitudinal strain (GLS) with marked reduction in
strain values (less negative numbers) most prominently in the apical segments (central red zone),
with an overall GLS of -8.2% (normal is about -20%) and a reduced ejection fraction of 41%. This
pattern is characteristic of Takotsubo cardiomyopathy, which typically demonstrates regional wall
motion abnormalities that predominantly involve the apex and mid segments of the left ventricle
with basal sparing.
The 2D echocardiographic images show apical ballooning, a hallmark of Takotsubo cardiomyopathy,
where the apex is akinetic or dyskinetic and the basal segments contract normally or hypercontract.
Doppler images show findings consistent with impaired ventricular function.
In contrast:
Apical hypertrophic cardiomyopathy (HCM) would show increased wall thickness localized to the
apex but not apical ballooning or reduced strain in that typical pattern.
Hypertrophic obstructive cardiomyopathy (HOCM) involves basal septal hypertrophy with outflow
obstruction, not apical akinesis or ballooning.
Restrictive cardiomyopathy from amyloidosis involves diffuse infiltration and generally a different
strain pattern with more uniform reduction and “apical sparing” rather than apical involvement.
This interpretation aligns with the diagnostic criteria and echocardiographic features described in the
adult echocardiography literature, including the "Textbook of Clinical Echocardiography" (Chapter on
Cardiomyopathies) and ASE guidelines, which highlight apical ballooning and regional strain
abnormalities as diagnostic features of Takotsubo cardiomyopathy【16:Cardiomyopathy
Chapter†Textbook of Clinical Echocardiography, 6e】【12:ASE Guidelines on Strain Imaging†p.130-
135】.

Comprehensive and Detailed Explanation From Exact Extract:
The image shows a pulsed-wave Doppler waveform with respiratory phasicity and distinct forward
and reversed flow components characteristic of hepatic vein flow patterns. Hepatic vein Doppler
typically displays a biphasic waveform with systolic (S) and diastolic (D) forward flow toward the
heart and brief reversed flow during atrial contraction (A wave reversal), reflecting right atrial
pressure changes.
Mitral and tricuspid inflow Doppler patterns show distinct E and A waves representing early and late
diastolic ventricular filling but do not have the same flow reversal pattern. Pulmonary vein Doppler
waveforms also differ, showing systolic and diastolic forward flows into the left atrium without the
prominent reversed flow seen here.
The hepatic vein Doppler is commonly used in echocardiography to assess right atrial pressure and
compliance, especially in conditions like constrictive pericarditis and right heart failure, where
characteristic flow reversals and expiratory changes are observed.
This pattern and its clinical significance are detailed in adult echocardiography references, including
the "Textbook of Clinical Echocardiography" and ASE guidelines on Doppler imaging【16:Hepatic
Vein Doppler†Textbook of Clinical Echocardiography, 6e】【12:ASE Doppler Guidelines†p.95-100】.

The most appropriate echocardiographic view to measure right ventricular (RV) dimensions is the
apical four-chamber view with a right ventricular-focused modification. This RV-focused apical four-
chamber view is optimized by shifting the transducer laterally and slightly anteriorly to better
visualize the entire right ventricle in a single plane. This approach allows for accurate assessment of
RV basal and mid cavity diameters, RV longitudinal dimension, and RV area measurements.
The standard apical four-chamber view often underestimates RV size because of its complex
geometry and position in the chest. The subcostal four-chamber view may give some information on
RV size but is limited by image quality and angle. Parasternal short axis views at the base focus more
on the left ventricle and may not capture the entire RV adequately. Parasternal long axis views
primarily visualize the left heart structures and do not adequately show the RV.
Adult echocardiography guidelines, including the American Society of Echocardiography (ASE)
chamber quantification recommendations, endorse the RV-focused apical four-chamber view as the
standard for RV linear measurements and volume assessment due to its accuracy and
reproducibility【12:ASE Chamber Quantification Guidelines†p.80-85】【16:Textbook of Clinical
Echocardiography, 6e†Chapter on RV Assessment】.

The echocardiographic image shows a mobile, highly echogenic, mesh-like structure within the right
atrium consistent with the Chiari network. The Chiari network is an embryologic remnant of the right
valve of the sinus venosus, appearing as a fenestrated, reticulated membrane that is usually thin and
mobile, found near the orifice of the inferior vena cava or the coronary sinus.
This structure is benign and often an incidental finding but can be confused with thrombus or atrial
tumors. Unlike left atrial thrombus, which appears as a more solid, immobile mass often located in
the left atrial appendage, the Chiari network is mobile and located in the right atrium. Cor
triatriatum is a rare congenital membrane dividing the left atrium into two chambers and appears
differently on echocardiography. Artifact refers to non-anatomic echoes which do not persist or move
consistently.
Recognition of Chiari network is important to avoid misdiagnosis, and its characteristics are well
described in echocardiography literature such as the "Textbook of Clinical Echocardiography" and ASE
imaging guidelines【16:Textbook of Clinical Echocardiography, 6e†p.400-402】【12:ASE Guidelines
on Cardiac Masses†p.150-155】.

The echocardiographic images show prominent trabeculations and deep intertrabecular recesses
communicating with the left ventricular cavity, best seen on contrast-enhanced images. This finding
is characteristic of left ventricular noncompaction (LVNC), a cardiomyopathy resulting from arrested
myocardial compaction during embryogenesis.
LVNC is diagnosed by visualizing a two-layered myocardium with a thin compacted epicardial layer
and a thicker noncompacted endocardial layer with deep trabecular recesses. The use of contrast
echocardiography enhances endocardial border delineation and recess visualization, increasing
diagnostic accuracy.
Loefler syndrome (hypereosinophilic cardiomyopathy) often shows endomyocardial fibrosis and
restrictive physiology but not prominent trabeculations. Hypertrophic cardiomyopathy shows
asymmetric septal hypertrophy without deep recesses. Ischemic cardiomyopathy shows wall motion
abnormalities but not characteristic trabecular patterns.
These diagnostic criteria and imaging features are well documented in the "Textbook of Clinical
Echocardiography" and ASE guidelines on cardiomyopathies and use of contrast echo【16:Textbook
of Clinical Echocardiography, 6e†Chapter on LV Noncompaction】【12:ASE Contrast
Echocardiography Guidelines†p.180-190】.

The proximal isovelocity surface area (PISA) method estimates the effective regurgitant orifice area
(EROA) in mitral regurgitation by measuring the radius of the hemispheric flow convergence region
(aliasing radius) and incorporating the aliasing velocity and the peak velocity of the MR jet.
The equation for EROA is:
EROA = (2ί × r² × Va) / Vmax
Where:
r = radius of the PISA hemisphere (aliasing radius)
Va = aliasing velocity (the velocity at which color aliasing occurs)
Vmax = peak MR velocity obtained by continuous wave Doppler
This calculation does not involve the mitral annular diameter, time velocity integral of mitral annulus,
or left ventricular outflow tract diameter.
Thus, the third necessary parameter after aliasing radius and velocity is the maximum MR velocity
measured by continuous wave Doppler, which allows determination of flow rate through the
regurgitant orifice.
This formula and its clinical application are well established in adult echocardiography literature and
ASE valvular regurgitation guidelines【12:ASE Valvular Regurgitation Guidelines†p.210-
220】【16:Textbook of Clinical Echocardiography, 6e†Chapter on Mitral Regurgitation
Assessment】.

Comprehensive and Detailed Explanation From Exact Extract:
Tetralogy of Fallot (TOF) is a congenital heart defect characterized by four key anatomical
abnormalities: an outlet (malalignment) ventricular septal defect (VSD), an overriding aorta that
receives blood from both ventricles, right ventricular outflow tract (RVOT) obstruction (commonly
infundibular stenosis), and resultant right ventricular hypertrophy. These defects cause cyanosis due
to right-to-left shunting and impaired pulmonary blood flow.
Option A describes Ebstein anomaly, characterized by a displaced tricuspid valve and atrialization of
the right ventricle.
Option B describes features more consistent with Shone complex or other left heart obstructive
lesions.
Option C describes atrioventricular septal defect (AVSD), seen in conditions like Down syndrome.
In unrepaired TOF, echocardiography demonstrates the large malalignment VSD, overriding aorta,
RVOT obstruction, and hypertrophied right ventricle. These are classic textbook findings described in
adult and pediatric echocardiography literature, including “Textbook of Clinical Echocardiography”
(Chapter on Congenital Heart Disease) and ASE guidelines【16:Textbook of Clinical
Echocardiography, 6e†p.560-565】【12:ASE Adult Congenital Guidelines†p.400-410】.

Comprehensive and Detailed Explanation From Exact Extract:
The P wave on the ECG corresponds to atrial depolarization, which precedes atrial contraction (atrial
systole). On echocardiography, atrial contraction can be observed as the atrial "kick," contributing to
ventricular filling during late diastole.
Ventricular contraction (QRS complex) and ventricular relaxation (T wave) correspond to other
phases of the cardiac cycle. Atrial relaxation occurs during ventricular systole but is not represented
by the P wave.
This timing relationship is critical for correlating echocardiographic Doppler inflow patterns, such as
the late diastolic A wave, with the ECG. These concepts are outlined in the foundational
echocardiography references, including ASE guidelines and the "Textbook of Clinical
Echocardiography"【16:Textbook of Clinical Echocardiography, 6e†p.150-155】【12:ASE
Echocardiography Guidelines†p.50-55】.