Fractional flow Reserve (FFR) evaluates functional significance of stenosis in intermediate coronary lesions. Instantaneous wave-free ratio (iFR) is considered noninferior to FFR and does not require adenosine administration.~This study was done to assess long-term clinical outcomes and factors associated with target vessel revascularization (TVR) in patients with deferred revascularization based on negative FFR and iFR.~Retrospective analysis of medical records of 345 patients with deferred revascularization at a tertiary care hospital , from January 2012 to January 2020 will be done.
The objective is to assess long-term clinical outcomes of patients in whom intervention of coronary lesions was deferred due to negative fractional flow reserve (FFR) and negative Instantaneous wave-free ratio (iFR) in a real-world patient population and to identify factors associated with deferred target lesion failure.