Two stage anchor and mitral valve assembly
Systems and methods for medical interventional procedures, including approaches to valve implantation. In one aspect, the methods and systems involve a modular approach to mitral valve therapy.
1. A method of implanting a prosthetic heart valve, the method comprising:
implanting an anchor structure adjacent a native valve of a heart by placing sub-annular projections of the anchor structure within an anatomical sub-annular gutter of the native valve and by placing a retention structure of the anchor structure above an annulus of the native valve, the retention structure configured to mate with an artificial valve and comprising at least one supra-annular arch segment extending between adjacent sub-annular projections; and
wherein the anchor structure includes a hub, and the implanting the anchor structure comprises releasably connecting a push rod to the hub and using the push rod to facilitate the placing the anchor structure within the anatomical sub-annular gutter of the native valve.
2. The method of claim 1 , wherein the anchor structure further comprises supra-annular arch segments extending between each pair of adjacent sub-annular projections such that the supra-annular arch segments form a continuous ring-like structure configured to mechanically engage with the artificial valve.
3. The method of claim 1 , wherein the prosthetic heart valve is implanted at a mitral valve annulus without substantially reshaping the annulus.
4. The method of claim 1 , wherein placing the anchor structure within the anatomical sub-annular gutter of the native valve comprises positioning one or more anchor feet of the anchor structure within the anatomical sub-annular gutter.
5. The method of claim 1 , wherein the native heart valve continues to function after implantation of the anchor structure.
6. The method of claim 1 , wherein at least two of the sub-annular projections of the anchor structure extend from the hub.
7. The method of claim 1 , wherein a valve delivery catheter containing the artificial valve is advanced into the heart over the push rod.
8. The method of claim 1 , wherein the artificial valve is advanced out of a delivery catheter into a left atrium of the heart.
9. The method of claim 8 , wherein the artificial valve is advanced out of the delivery catheter into the left atrium of the heart prior to connecting the artificial valve to the implanted anchor structure.
10. The method of claim 9 , wherein the artificial valve partially expands when advanced out of the delivery catheter in the left atrium, and wherein the artificial valve further expands during connecting the artificial valve to the implanted anchor structure.
11. The method of claim 1 , wherein the anchor structure comprises three supra-annular arch segments.
12. The method of claim 1 , wherein the artificial valve has at least one upper arch segment configured to nest within said at least one supra-annular arch segment of the retention structure.
13. The method of claim 1 , wherein the artificial valve comprises an expandable frame with a stent structure having an inferior end and a superior end, the inferior end having a non-circular axial opening larger than a circular axial opening in the superior end.
14. The method of claim 1 , wherein the sub-annular projections are positioned outwardly away from the retention structure.
15. The method of claim 1 , wherein a sub-annular portion of the anchor structure includes an anti-SAM (systolic anterior motion) component that, while the anchor structure is implanted, abuts a natural anterior leaflet to hinder the natural anterior leaflet from obstructing an aortic outflow tract.
16. The method of claim 1 , wherein four sub-annular projections of the anchor structure are placed within the anatomical sub-annular gutter of the native valve.
17. A method of implanting a prosthetic heart valve, the method comprising:
implanting an anchor structure adjacent a native valve of a heart by placing sub-annular projections of the anchor structure within an anatomical sub-annular gutter of the native valve and by placing a retention structure of the anchor structure above an annulus of the native valve, the retention structure configured to mate with an artificial valve and comprising at least one supra-annular arch segment extending between adjacent sub-annular projections;
advancing a valve delivery catheter into the heart;
advancing an artificial valve out of the valve delivery catheter and into a left atrium of the heart such that the artificial valve partially expands; and
connecting the artificial valve to the implanted anchor structure by further expanding the artificial valve.
18. The method of claim 17 , wherein the anchor structure further comprises supra-annular arch segments extending between each pair of adjacent sub-annular projections such that the supra-annular arch segments form a continuous ring-like structure configured to mechanically engage with the artificial valve.
19. The method of claim 17 , wherein the artificial valve has at least one upper arch segment configured to nest within the at least one supra-annular arch segment of the retention structure.
20. The method of claim 17 , wherein the artificial valve comprises an expandable frame with a stent structure having an inferior end and a superior end, the inferior end having a non-circular axial opening larger than a circular axial opening in the superior end.