Fractional Flow Reserve measures the pressure difference before and after a blockage in the coronary artery.
This helps doctors determine whether the blockage is significantly reducing blood flow to the heart.
The FFR value is usually between 0 and 1.
FFR = 1.0 → Normal blood flow
FFR above 0.80 → Usually no need for stent
FFR below 0.80 → Significant blockage that may require treatment such as angioplasty