NBE Stress Echocardiography 2

Question 1

Which wall motion scoring index (WMSI) value indicates significant ischemia during stress echocardiography?

Accepted Answer

WMSI > 1.5

Answer

A WMSI greater than 1.5 is considered significant, as scores above this threshold indicate extensive wall motion abnormalities suggestive of ischemia.

Question 2

During dobutamine stress echo, which finding in a previously akinetic segment indicates myocardial viability?

Accepted Answer

Biphasic response with improvement at low dose and deterioration at peak dose

Answer

A biphasic response (improvement at low-dose dobutamine followed by worsening at peak dose) is the classic marker of viable but ischemic myocardium.

Question 3

What is the recommended imaging protocol when using exercise stress echocardiography on a treadmill?

Accepted Answer

Images acquired at rest and immediately post-exercise within 60–90 seconds

Answer

Post-exercise images must be acquired within 60–90 seconds because wall motion abnormalities resolve rapidly after exercise cessation.

Question 4

Which pharmacological agent is used to reverse the effects of dobutamine during stress echocardiography?

Accepted Answer

Metoprolol (esmolol)

Answer

Beta-blockers such as esmolol or metoprolol are used to reverse tachycardia and other adverse effects of dobutamine.

Question 5

A new regional wall motion abnormality during stress echocardiography involves the anterior wall and apex. Which coronary artery territory does this most likely represent?

Accepted Answer

Left anterior descending artery (LAD)

Answer

The LAD supplies the anterior wall, apex, and anteroseptal segments, so ischemia in these regions implicates the LAD territory.

(NBE) National Board of Echocardiography Practice Test

(NBE) National Board of Echocardiography Practice Test

NBE Stress Echocardiography 2