Quantitative flow ratio for immediate assessment of nonculprit lesions in patients with ST‐segment elevation myocardial infarction—An iSTEMI substudy

Abstract

We evaluated the diagnostic performance of quantitative flow ratio (QFR) assessment of nonculprit lesions (NCLs) based on acute setting angiograms obtained in patients with ST‐segment elevation myocardial infarction (STEMI) with QFR, fractional flow reserve (FFR), and instantaneous wave‐free ratio (iFR) in the staged setting as reference.