Reduced Profile Prosthetic Heart Valve

A collapsible prosthetic heart valve comprises a stent body extending longitudinally from an inflow end to an outflow end, featuring cells arranged in circumferential rows, and an attached cuff. The valve includes a plurality of leaflet attachment panels and a plurality of leaflets. Each leaflet attachment panel is attached to the stent and spans at least a portion of a cell. The panels are non-integral with the stent body, the cuff, and the leaflets. Each leaflet comprises tabs sutured to a respective leaflet attachment panel. This configuration facilitates a reduced valve profile and increases available space for additional features, such as paravalvular leak mitigation, while maintaining collapsibility for minimally invasive delivery via catheter or similar apparatus.