ARDMS Echo Cardiac Hemodynamics 3

Question 1

Which measurement is used to calculate the dimensionless index (DI) for aortic stenosis severity?

Accepted Answer

LVOT VTI / AV VTI

Answer

AV VTI / LVOT VTI

Answer

LVOT peak velocity / AV peak velocity

Answer

AV area / LVOT area

Question 2

What IVC collapsibility finding is associated with elevated right atrial pressure?

Accepted Answer

IVC > 2.1 cm with <50% collapse

Answer

IVC < 2.1 cm with >50% collapse

Answer

IVC > 2.1 cm with >50% collapse

Answer

IVC < 2.1 cm with <50% collapse

Question 3

Which Doppler finding on hepatic vein flow indicates severe tricuspid regurgitation?

Accepted Answer

Systolic flow reversal

Answer

Increased diastolic forward flow

Answer

Blunted systolic forward flow only

Answer

Normal systolic and diastolic flow

Question 4

What is the significance of a Vp (flow propagation velocity) < 45 cm/s on color M-mode Doppler?

Accepted Answer

Impaired LV relaxation and elevated filling pressures

Answer

Normal diastolic function

Answer

Hyperdynamic LV systolic function

Answer

Elevated cardiac output

Question 5

Which stroke volume calculation method uses LVOT cross-sectional area and velocity time integral?

Accepted Answer

Continuity equation method

Answer

Biplane Simpson method

Answer

Pressure half-time method

Answer

PISA method

Question 6

What does a shortened mitral deceleration time (<150 ms) suggest in a patient with LV dysfunction?

Accepted Answer

Elevated LV filling pressures with restrictive physiology

Answer

Normal diastolic function

Answer

Impaired LV relaxation with low filling pressures

Answer

Hyperdynamic function