CCI RCIS 4

Question 1

Which of the following describes a 'type A' coronary lesion morphology per the ACC/AHA classification?

Accepted Answer

Discrete lesion <10 mm, concentric, non-angulated, smooth contour

Answer

Type A lesions are discrete, concentric, accessible, and non-calcified, carrying the highest procedural success and lowest complication rates.

Question 2

Fractional flow reserve (FFR) of 0.75 in a 70% stenosis coronary lesion indicates:

Accepted Answer

Hemodynamically significant ischemia — revascularization is warranted

Answer

An FFR ≤0.80 (especially ≤0.75) indicates physiologically significant ischemia, supporting revascularization to improve outcomes.

Question 3

When using a thermodilution catheter to measure cardiac output, which injectate temperature produces the MOST accurate results?

Accepted Answer

Iced saline (approximately 0–4°C)

Answer

Iced injectate creates a larger temperature differential, improving signal-to-noise ratio and accuracy of the thermodilution curve.

Question 4

Which ECG finding is MOST concerning for left main coronary artery disease during stress testing or symptom onset?

Accepted Answer

ST elevation in V1 and aVR with diffuse ST depression in other leads

Answer

ST elevation in aVR with diffuse ST depression suggests global subendocardial ischemia, classically associated with left main or proximal LAD disease.

Question 5

The 'normal' pulmonary vascular resistance (PVR) in a patient without cardiopulmonary disease is approximately:

Accepted Answer

50–150 dynes·sec·cm⁻⁵

Answer

Normal PVR is 50–150 dynes·sec·cm⁻⁵, far lower than systemic resistance, reflecting the low-resistance pulmonary circuit.

CCI - Cardiovascular Credentialing International Practice Test

CCI - Cardiovascular Credentialing International Practice Test

CCI RCIS 4