CSC Diagnostic Imaging & Procedures Flashcards
6 cards from real CSC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CSC Diagnostic Imaging & Procedures flashcards as text
What does a wall motion score index (WMSI) of 1.0 indicate in echocardiography?
Answer: Normal wall motion throughout
A WMSI of 1.0 means all 16 or 17 segments score 1 (normal), indicating global normal wall motion.
In cardiac MRI, late gadolinium enhancement (LGE) identifies:
Answer: Myocardial fibrosis or scar tissue
LGE in cardiac MRI reflects areas where gadolinium accumulates due to expanded extracellular space from fibrosis or necrosis, identifying myocardial scar.
The modified Bernoulli equation (ΔP = 4V²) is used in echo to estimate:
Answer: Pressure gradients across valves or defects
The simplified Bernoulli equation converts peak Doppler velocity to pressure gradient across stenotic valves or intracardiac defects.
Which imaging modality is considered the gold standard for assessing left ventricular volumes and ejection fraction?
Answer: Cardiac MRI
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.
Fractional flow reserve (FFR) is used during coronary angiography to assess:
Answer: Hemodynamic significance of coronary stenosis
FFR measures the pressure ratio across a stenosis to determine if a lesion is hemodynamically significant and likely to cause ischemia.
Right heart catheterization measures all of the following EXCEPT:
Answer: Coronary artery stenosis severity
Right heart catheterization measures hemodynamic pressures (PA, PCWP, RAP) and cardiac output but does not assess coronary artery anatomy — that requires coronary angiography.