TCT-479 Impact of Left Ventricular Outflow Tract (LVOT) Morphology and LVOT-Annular Mismatch on Paravalvular Leak and New Conduction Abnormalities after Transcatheter Aortic Valve Replacement: Concept of the “Non-Tubular Index” and LVOT Sealing Zone

Background Annular sizing predicts paravalvular leak (PVL) and new persistent left bundle branch block (pLBBB), but little is known on Left Ventricular Outflow Tract (LVOT) anatomy on TAVR outcomes. The LVOT seal zone was defined as an elliptical frustum and LVOT-Annular mismatch was expressed by the absolute difference between Annulus (A1) and LVOT (A2) areas by CT corrected to the volume of frustum.