DIAGNOSTIC ACCURACY OF BASAL STENOSIS RESISTANCE INDEX FOR MYOCARDIAL ISCHEMIA IDENTIFIED BY FRACTIONAL FLOW RESERVE AND IMPLICATIONS OF STENOSIS RESISTANCE INDEX DETERMINED AT SUB–MAXIMALLY ELEVATED CORONARY FLOW RATES

Basal stenosis resistance index (BSR) is a novel adenosine–free index with a diagnostic accuracy for myocardial ischemia on perfusion scintigraphy mirroring fractional flow reserve (FFR). However, its diagnostic accuracy for myocardial ischemia identified by FFR is unknown, and the diagnostic