Fractional flow reserve (FFR)
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