Echocardiogram Network Fundamentals 5

Question 1

In a patient with sick sinus syndrome, which echocardiographic finding may result from chronic bradycardia?

Accepted Answer

Left atrial dilation from increased filling pressures

Answer

Chronic bradycardia with sick sinus syndrome can lead to left atrial enlargement due to prolonged diastolic filling and elevated left atrial pressure.

Question 2

Which myocardial segment is most commonly affected in right coronary artery (RCA) occlusion and may show wall motion abnormalities on echo?

Accepted Answer

Inferior wall and right ventricle

Answer

The RCA supplies the inferior wall and right ventricle, so occlusion typically causes inferior and/or right ventricular wall motion abnormalities.

Question 3

Which echocardiographic parameter is most useful for assessing left atrial pressure in a patient with atrial fibrillation?

Accepted Answer

E/e' ratio using lateral annulus TDI

Answer

In atrial fibrillation, E/e' ratio using tissue Doppler remains valid for estimating left atrial pressure when the A-wave is absent.

Question 4

A patient with permanent pacemaker implantation now shows new severe mitral regurgitation. What pacemaker-related cause should be considered?

Accepted Answer

RV pacing-induced dyssynchrony causing papillary muscle dysfunction

Answer

Chronic RV apical pacing creates mechanical dyssynchrony similar to LBBB, which can alter papillary muscle geometry and worsen mitral regurgitation.

Question 5

What does the term 'strain imaging' measure in relation to cardiac mechanics?

Accepted Answer

Myocardial deformation as percentage of length change

Answer

Strain imaging measures myocardial deformation (shortening or lengthening) as a percentage change from baseline length, reflecting regional contractility.

(Echocardiogram) Certified Echocardiogram Technician Practice Test

(Echocardiogram) Certified Echocardiogram Technician Practice Test

Echocardiogram Network Fundamentals 5