Prosthetic heart valve

A prosthetic valve comprising:

• a plurality of valve leaflets arranged to provide one-way longitudinal flow through the valve each having an outlet edge opposite an arcuate peripheral edge;
• a collapsible, self-expandable frame configured to support the valve leaflets and defining a plurality of convex commissure portions cantilevered in an outflow direction, wherein the self-expandable frame comprises a superelastic alloy such that the frame may be collapsed for delivery of the valve, wherein the frame comprises an undulating continuous elongated wireform defining a plurality of convex cusp portions intermediate the commissure portions;
• and
• a stent subassembly configured to secure the valve to a surrounding lumen, the stent subassembly comprising a stent having a circumferential base member with cusps that coincide with and align longitudinally with respective ones of the frame cusp portions and a plurality of posts that extend longitudinally therefrom adjacent and to an outside of respective ones of the plurality of commissure portions of the frame, the stent subassembly being attached to the self-expandable frame with the arcuate peripheral edges of the valve leaflets being secured between the aligned frame cusp portions and the stent cusps, while the outlet edges attach at their ends to the frame commissure portions and adjacent stent posts, and wherein the stent subassembly may be collapsed in the same manner as the frame for delivery of the valve, and
• wherein the valve is expandable toward a neutral configuration and collapsible to a collapsed delivery configuration for delivery of the valve to an implantation site within a body lumen.