An Ovine Model of Mitral Bioprosthetic Valve Induced Left Ventricular Outflow Tract Obstruction Due to Systolic Anterior Motion of the Fully Retained Native Anterior Leaflet. Heart, Lung and Circulation 28:S74 (2019)

Abstract

Aim: Mitral valvular–ventricular interaction includes the following mechanisms. 1. Chordal annulo-papillary connection preventing excessive diastolic dilatation. 2. Systolic closure of the valve during isovolumic left ventricular (LV) contraction causes shortening of the LV long axis. This effect “turbo-charges” the systolic function of the LV. 3. The diastolic baffle effect of the anterior leaflet improves laminar flow through the LV. 4. The dynamic action of the annulus improves diastolic LV filling (“lusitropy”).

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