Question 1
A 55-year-old male with stable angina undergoes coronary angiography, revealing a 60% intermediate lesion in the left anterior descending (LAD) artery. What diagnostic method or threshold is used to confirm whether this lesion is physiologically and hemodynamically significant?
Rationale
Correct Answer: B
- Explanation: Fractional Flow Reserve (FFR) measures the ratio of maximal blood flow through a stenotic area to normal maximal flow. It evaluates the exact hemodynamic significance of intermediate stenoses. Without FFR, lesions are generally assumed physiologically significant only when luminal diameter reduction exceeds 70%.