Prosthetic heart valve with leaflet shelving

摘要

Described embodiments are directed toward prosthetic valve leaflets of particular configurations that control bending character. In embodiments provided herein, a valve leaflet is provided with a planar zone that is bounded at a planar zone base by a straight line, wherein the leaflet is operable to bend along a base of the planar zone.

主权项

1. A prosthetic valve comprising:
a leaflet frame defining commissure posts, the leaflet frame having a tubular shape that defines a longitudinal axis, the leaflet frame has a leaflet frame first end and a leaflet frame second end that is opposite the leaflet frame first end, the commissure posts are adjacent the leaflet frame first end; and a plurality of leaflets coupled to the leaflet frame, each leaflet coupled to two of the commissure posts and including a free edge and a leaflet base, wherein each of the plurality of leaflets is operable to bend about a straight base segment of its leaflet base, wherein each straight base segment has a length of less than a length of a chord defined as a straight line that extends from two of the commissure posts and lies on a plane that is perpendicular to the longitudinal axis of the leaflet frame, wherein each straight base segment is parallel to a respective chord, wherein each leaflet base has a flat portion that defines a shelf structure and each leaflet base is coupled to the leaflet frame at its shelf structure.