Prosthetic mitral valve and delivery method
A valve prosthesis and methods for implanting the prosthesis are provided. The prosthesis generally includes a self-expanding frame and two or more engagement arms. A valve prosthesis is sutured to the self-expanding frame. Each engagement arm corresponds to a native mitral valve leaflet. At least one engagement arm immobilizes the native leaflets, and holds the native leaflets close to the main frame. The prosthetic mitral valve frame also includes two or more anchor attachment points. Each anchor attachment point is attached to one or more anchors that help attach the valve prosthesis to the heart.
1. A mitral valve prosthesis comprising:
a) an expandable inflow region formed of a plurality of cells and configured to expand within and support against the walls of the left atrium, wherein the expandable inflow region has a cross-sectional diameter larger than the annulus of the native mitral valve;
b) an expandable outflow region formed of a plurality of cells and configured to expand within and support against the native mitral valve annulus, wherein the expandable outflow region comprises,
i) two or more engagement arms, and
ii) at least two anchor attachment points;
c) a prosthetic valve; and
d) one or more anchors, wherein a first end of each anchor is attached to one of the at least two anchor attachment points of the expandable outflow region and a second end of each anchor is operatively coupled to an anchoring element that is configured to attach to heart structure, the anchoring element including a lock having a first position that permits adjustment of tension in the anchor and a second position that locks the anchor at a desired tension, wherein the anchoring element is a clip and wherein the lock of the anchoring element is comprised of opposing jaw portions of the clip.
2. The mitral valve prosthesis of claim 1 , wherein the anchor comprises a biocompatible material.
3. The mitral valve prosthesis of claim 2 , wherein the biocompatible material is linearly elastic.
4. The mitral valve prosthesis of claim 2 , wherein the biocompatible material is viscoelastic.
5. The mitral valve prosthesis of claim 1 , wherein the anchoring element is configured to attach to the wall of the left ventricle.
6. The mitral valve prosthesis of claim 1 , wherein the anchoring element is configured to attach to a papillary muscle of the heart.
7. The mitral valve prosthesis of claim 1 , wherein the anchor is configured to function as an artificial chordae.
8. The mitral valve prosthesis of claim 1 , wherein the expandable outflow region further comprises at least two commissural sealing members.
9. The mitral valve prosthesis of claim 8 , wherein the commissural sealing members extend at an angle of about 90 degrees to the engagement arms.
10. The mitral valve prosthesis of claim 8 , wherein the commissural sealing members are configured to seal native commissures of the heart and prevent peri-valvular leakage (PVL).
11. The mitral valve prosthesis of claim 1 , wherein the prosthetic valve is sutured to the expandable inflow region.
12. The mitral valve prosthesis of claim 1 , wherein the anchor attachment points comprise two or more eyelets.
13. The mitral valve prosthesis of claim 1 , wherein the expandable outflow region further comprises two or more commissure posts, wherein ends of the engagement arms are each coupled to one of the commissure posts.
14. The mitral valve prosthesis of claim 1 , wherein the opposing jaw portions are separated in the first position of the lock that permits adjustment of tension in the anchor.
15. The mitral valve prosthesis of claim 14 , wherein the opposing jaw portions are closed together with the anchor therebetween in the second position of the lock that locks the anchor at a desired tension.