Abstract
Background: Quantification of aortic regurgitation (AR) by echo remains challenging. In particular, calculation of differential flow across the mitral annulus and left ventricular outflow tract (LVOT) suffers from squared linear measures and incorrect assumption the LVOT and mitral annulus are flat and round. More than 10 years ago Tribouilloy et al. suggested a pulse wave Doppler velocity time integral (VTI) ratio between the mitral leaflet tips (MV) and LVOT as a geometrically independent, semi-quantitative tool to reflect differential flow in mitral regurgitation. We evaluated this approach in patients with isolated aortic regurgitation.
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