ARDMS Echo Hemodynamic Assessment 2

Question 1

The RVOT acceleration time (AT) is used to estimate mean pulmonary artery pressure. Which formula applies?

Accepted Answer

mPAP = 79 − (0.45 × AT)

Answer

mPAP ≈ 79 − (0.45 × RVOT AT in ms) is a validated formula; shorter AT corresponds to higher pulmonary artery pressure.

Question 2

In a patient with severe aortic regurgitation, which Doppler measurement reflects the severity of diastolic aortic regurgitation?

Accepted Answer

Pressure half-time of the AR jet (shorter = more severe)

Answer

A short AR jet pressure half-time (<200–300 ms) indicates rapid equalization of aortic and LV diastolic pressures, signifying severe AR.

Question 3

Which non-invasive Doppler parameter is used to calculate systemic vascular resistance (SVR)?

Accepted Answer

(Mean arterial pressure − mean RAP) / cardiac output

Answer

SVR = (MAP − RAP) / CO, where MAP and RAP can be estimated echocardiographically and CO is derived from LVOT stroke volume.

Question 4

Diastolic dysfunction grading (Grades I–III) is classified using which combination of parameters per ASE 2016 guidelines?

Accepted Answer

E/A ratio, E/e' ratio, LAVI, and TR velocity

Answer

The 2016 ASE/EACVI algorithm uses E/A ratio, average E/e', LAVI, and peak TR velocity to classify diastolic dysfunction severity.

Question 5

Cardiac output measured by the Fick method requires which echocardiographic input?

Accepted Answer

Doppler-derived cardiac output from LVOT

Answer

Echo-derived cardiac output (CO = SV × HR from LVOT VTI method) can be used alongside or in place of the Fick method in the catheterization lab.

ARDMS Echo - American Registry for Diagnostic Medical Sonography Echocardiography Practice Test