Impact of Pre-Intervention Transaortic Flow Rate Versus Stroke Volume Index on Mortality Across the Hemodynamic Spectrum of Severe Aortic Stenosis

Transvalvular flow rate (FR), which is stroke volumedivided by left ventricular ejection time (in milliliters per second), is physiologically likely to be a better marker of transvalvular flow in patients with severe aortic stenosis (AS) compared with stroke volumeindex (SVi), a traditional marker