Significant Coronary artery lesion
A coronary artery lesion is generally considered significant and flow-limiting if the narrowing of the luminal diameter is estimated to be ——- or greater.
[A] 50%
[B] 70%
[C] 80%
[D] 90%
Fractional flow reserve (FFR) measurement –
Maximum achievable blood flow in a diseased coronary artery / Theoretical maximum flow in a normal coronary artery.
- Ratio between the maximum achievable blood flow in a diseased coronary artery and the theoretical maximum flow in a normal coronary artery.
- An FFR of 1.0 is widely accepted as normal.
- An FFR lower than 0.75-0.80 is generally considered to be associated with myocardial ischemia
