IMPACT OF AORTIC PULSATILITY RATIO AND DOUBLE PRODUCT ON INDICES OF FUNCTIONAL CORONARY STENOSIS SEVERITY IN PATIENTS UNDERGOING CORONARY INTERVENTION

Invasive physiological indices such as fractional flow reserve (FFR) and instantaneous wave-free ratio (iFR) are used in clinical practice to identify ischemia-causing epicardial stenosis. While FFR requires maximal hyperaemic response to agents like adenosine, iFR does not. Increased aortic