FLOW RESERVE ASSESSED BY FLOW RATE BUT NOT BY STROKE VOLUME PREDICTS MORTALITY IN LOW-FLOW, LOW-GRADIENT AORTIC STENOSIS

Abstract

Flow reserve i.e. an increase in stroke volume >20% (Δ20%SV) during dobutamine stress echocardiography (DSE), has been used to predict mortality following surgical aortic valve replacement (AVR) in patients with classical low-flow, low-gradient aortic stenosis (CLF-AS). We hypothesized that mean