ARDMS AE-Adult-Echocardiography Exam Questions

Pulmonary artery end-diastolic pressure (PAEDP) can be estimated noninvasively by measuring the end-diastolic velocity of pulmonary regurgitation (pulmonary insufficiency) using continuous-wave Doppler. The pressure gradient between the pulmonary artery and right ventricle at end-diastole is calculated using the modified Bernoulli equation from this velocity.

Tricuspid insufficiency is used to estimate right ventricular systolic pressure. Tricuspid inflow and pulmonary inflow velocities provide information on diastolic function but not direct pressure gradients.

This method is well validated and included in ASE guidelines for pulmonary hypertension assessment and Doppler hemodynamics16:Textbook of Clinical Echocardiography, 6ep.300-30512:ASE Doppler Guidelinesp.110-115.

A continuous murmur, heard throughout systole and diastole, is most characteristically caused by a patent ductus arteriosus (PDA). PDA represents persistent communication between the aorta and pulmonary artery, allowing continuous blood flow during both phases of the cardiac cycle.

Ventricular septal defect usually produces a holosystolic murmur. Concomitant aortic stenosis and mitral regurgitation cause separate murmurs but not continuous. Ebstein anomaly with atrial septal defect typically produces murmurs related to tricuspid regurgitation or ASD but not a continuous murmur.

This clinical correlation is detailed in the 'Textbook of Clinical Echocardiography, 6e', Chapter on Congenital Heart Disease and Murmur Etiologies20:420-425Textbook of Clinical Echocardiography.

Tricuspid annular plane systolic excursion (TAPSE) is measured as the linear displacement of the tricuspid annulus during systole and is expressed in centimeters (cm). It quantifies right ventricular longitudinal systolic function.

Centimeters per second is a velocity measurement used in tissue Doppler imaging. Milliliters per minute refers to volume flow, and millimeters of mercury measures pressure.

This is standardized in the 'Textbook of Clinical Echocardiography, 6e', Chapter on Right Ventricular Functional Assessment20:320-325Textbook of Clinical Echocardiography.

Comprehensive and Detailed Explanation From Exact Extract:

The video shows a subcostal IVC view with measurement of IVC diameter and respiratory collapsibility. The IVC appears dilated (>2.1 cm) with less than 50% collapse on inspiration, suggesting elevated right atrial pressure (RAP).

According to ASE guidelines for noninvasive RAP estimation, an IVC diameter >2.1 cm with <50% collapsibility corresponds to an RAP of approximately 10 mmHg.

Lower RAP values correspond to smaller IVC and greater collapsibility. This is a standard measurement in adult echocardiography practice and ASE chamber quantification guidelines12:ASE Chamber Quantification Guidelinesp.80-8516:Textbook of Clinical Echocardiography, 6ep.115-120.

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 cardiomyopathy16:Cardiomyopathy ChapterTextbook of Clinical Echocardiography, 6e12:ASE Guidelines on Strain Imagingp.130-135.