Prosthetic heart valve

摘要

Disclosed prosthetic valves can comprise a sewing ring configured to secure the valve to an implantation site. Some disclosed valves comprise a resiliently collapsible frame having a neutral configuration and a collapsed deployment configuration. Some disclosed frames can self-expand to the neutral configuration when released from the collapsed deployment configuration. Collapsing a disclosed valve can provide convenient access to the sewing ring, such as for securing the valve to the implantation site, as well as for the insertion of the valve through relatively small surgical incisions.

主权项

1. A prosthetic valve comprising:
a plurality of valve leaflets; a collapsible, self-expandable frame assembly configured to support the valve leaflets and defining a plurality of commissure portions, wherein the self-expandable frame assembly comprises an undulating continuous elongated wireform member alternately defining convex cusp portions on an inflow end thereof intermediate convex commissure portions on an outflow end thereof, made from a super elastic alloy such that each of the commissure portions is configured to be folded radially inward to a longitudinally collapsed position for delivery of the valve to an implantation site within a body lumen; and a sewing ring comprising an annular suture-permeable member for contacting a surrounding lumen, the sewing ring being attached to the valve at the inflow end and radially outward of the frame assembly cusp portions, wherein the plurality of commissure portions are adapted to be cantilevered and not in contact with the surrounding lumen and configured to move independently of the sewing ring when it is in contact with the surrounding lumen.