CSC CSC Diagnostic Imaging & Procedures 2

Question 1

What does a wall motion score index (WMSI) of 1.0 indicate in echocardiography?

Accepted Answer

Normal wall motion throughout

Answer

A WMSI of 1.0 means all 16 or 17 segments score 1 (normal), indicating global normal wall motion.

Question 2

In cardiac MRI, late gadolinium enhancement (LGE) identifies:

Accepted Answer

Myocardial fibrosis or scar tissue

Answer

LGE in cardiac MRI reflects areas where gadolinium accumulates due to expanded extracellular space from fibrosis or necrosis, identifying myocardial scar.

Question 3

The modified Bernoulli equation (ΔP = 4V²) is used in echo to estimate:

Accepted Answer

Pressure gradients across valves or defects

Answer

The simplified Bernoulli equation converts peak Doppler velocity to pressure gradient across stenotic valves or intracardiac defects.

Question 4

Which imaging modality is considered the gold standard for assessing left ventricular volumes and ejection fraction?

Accepted Answer

Cardiac MRI

Answer

Cardiac MRI is considered the gold standard for LV volume and ejection fraction measurement due to its excellent spatial resolution and lack of geometric assumptions.

Question 5

Fractional flow reserve (FFR) is used during coronary angiography to assess:

Accepted Answer

Hemodynamic significance of coronary stenosis

Answer

FFR measures the pressure ratio across a stenosis to determine if a lesion is hemodynamically significant and likely to cause ischemia.

CSC - Cardiac Subspecialty Certification Exam Practice Test

CSC - Cardiac Subspecialty Certification Exam Practice Test

CSC CSC Diagnostic Imaging & Procedures 2