EXPANDABLE PROSTHETIC VALVE HAVING ANCHORING APPENDAGES

摘要

A heart valve prosthesis includes an expandable prosthetic valve including three valve leaflets coupled to an anchoring structure. The anchoring structure includes an annular member and a plurality of arms movably coupled to the annular member at one end. The free ends of the arms extend radially away from the prosthesis toward a valve annulus. The arms are configured to fit in a space defined between an open native valve leaflet and a wall of a valve sinus. The arms are sufficiently resilient such that they resist downward movement in response to pressure exerted on the prosthesis, facilitating anchorage and stabilization of the prosthesis at the implantation site.

主权项

1. A valve prosthesis for implantation in or near a human heart at a valve site, the valve site including one or more valve sinuses, the prosthesis comprising:
an anchoring structure comprising an annular outflow member, an annular inflow member, and a plurality of arms each coupled at one end to the annular outflow member, the arms having a first end coupled to the annular outflow member and a second end configured to contact a base of the valve sinus; and a plurality of leaflets coupled to the anchoring structure and adapted to substantially allow blood flow in a first direction and to substantially prevent blood flow in a second direction; wherein the annular outflow member has an expanded position generally configured to engage a vessel wall at a location distal to the valve sinus, and wherein at least one of the plurality of arms is shaped to engage substantially an entire longitudinally extending surface of the valve sinus.