Fractional Flow Reserve, Myocardial

**Definition:** The ratio of maximum blood flow to the MYOCARDIUM with CORONARY STENOSIS present, to the maximum equivalent blood flow without stenosis. The measurement is commonly used to verify borderline stenosis of CORONARY ARTERIES.

**Tree numbers:** - G09.330.100.324.500

**Synonyms:** - Myocardial Fractional Flow Reserve