Prosthetic heart valve with upper skirt
A prosthetic heart valve includes a valve ring, which includes metal segments, and which is cylindrical when in an expanded state. A valve ring fabric sleeve is coupled to the valve ring. A leaflet frame is disposed within the valve ring. A plurality of prosthetic leaflets are coupled to the leaflet frame. An upper skirt includes an upper skirt fabric, coupled to the valve ring fabric sleeve; and a flexible upper skirt frame, coupled to the upper skirt fabric such that the upper skirt fabric separates a downstream end of the upper skirt frame from an upstream end of the metal segments of the valve ring. When the prosthetic heart valve is in an expanded state, the upper skirt extends radially outward from the valve ring in an upstream direction and is configured to rest against an atrial surface of the heart. Other embodiments are also described.
1. A prosthetic heart valve for implantation at a native heart valve of a heart, the prosthetic heart valve configured to assume a collapsed state for transcatheter delivery and an expanded state, the prosthetic heart valve comprising:
a valve ring, which comprises metal segments, wherein (i) when the prosthetic heart valve is in its collapsed state, the valve ring is in a collapsed state, and (ii) when the prosthetic heart valve is in its expanded state, the valve ring is in an expanded state such that the valve ring is cylindrical;
a valve ring fabric sleeve, which is coupled to the valve ring;
a leaflet frame, which is disposed within the valve ring;
a plurality of prosthetic leaflets, which are coupled to the leaflet frame, and configured to facilitate upstream-to-downstream bloodflow longitudinally through the prosthetic heart valve; and
an upper skirt, which:
(i) comprises (a) an upper skirt fabric, which is coupled to the valve ring fabric sleeve, and (b) a flexible upper skirt frame, which is coupled to the upper skirt fabric such that the upper skirt fabric separates a downstream end of the upper skirt frame from an upstream end of the metal segments of the valve ring, and
(ii) when the prosthetic heart valve is in its expanded state, extends radially outward from the valve ring in an upstream direction and is configured to rest against an atrial surface of the heart.
2. The prosthetic heart valve according to claim 1 , further comprising a valve leaflet frame fabric, which is coupled to the leaflet frame.
3. The prosthetic heart valve according to claim 2 , wherein the valve leaflet frame fabric is coupled to the valve ring fabric sleeve.
4. The prosthetic heart valve according to claim 1 , wherein the valve ring is configured such that the metal segments are curved when the valve ring is in its expanded state.
5. The prosthetic heart valve according to claim 1 , wherein the valve ring fabric sleeve surrounds the valve ring.
6. The prosthetic heart valve according to claim 1 , wherein the flexible upper skirt frame comprises Nitinol.
7. The prosthetic heart valve according to claim 1 , wherein, when the prosthetic heart valve is in its expanded state, the upper skirt frame is shaped so as to define upstream peaks and downstream troughs, and wherein the downstream troughs define the downstream end of the upper skirt frame.
8. The prosthetic heart valve according to claim 1 , further comprising a lower skirt, which comprises a lower skirt fabric coupled to a flexible lower skirt frame.
9. The prosthetic heart valve according to claim 1 , wherein the native heart valve is a native mitral valve, and wherein the upper skirt is configured to rest against the atrial surface within a left atrium of the heart when the prosthetic heart valve is in its expanded state.
10. The prosthetic heart valve according to claim 1 , further comprising a plurality of anchors coupled to the metal segments of the valve ring.
11. A method comprising:
transcatheterally advancing a prosthetic heart valve toward a native heart valve of a heart while the prosthetic heart valve is in a collapsed state and a valve ring of the prosthetic heart valve is in a collapsed state; and
at the native heart valve, expanding the prosthetic heart valve to an expanded state in which:
the valve ring is in an expanded state such that the valve ring is cylindrical,
wherein a valve ring fabric sleeve is coupled to the valve ring,
a leaflet frame is disposed within the valve ring, and a plurality of prosthetic leaflets, which are coupled to the leaflet frame, facilitate upstream-to-downstream bloodflow longitudinally through the prosthetic heart valve, and
an upper skirt extends radially outward from the valve ring in an upstream direction and rests against an atrial surface of the heart, wherein the upper skirt includes (a) an upper skirt fabric, which is coupled to the valve ring fabric sleeve, and (b) a flexible upper skirt frame, which is coupled to the upper skirt fabric such that the upper skirt fabric separates a downstream end of the upper skirt frame from an upstream end of metal segments of the valve ring.
12. The method according to claim 11 , wherein the prosthetic heart valve further includes a valve leaflet frame fabric, which is coupled to the leaflet frame.
13. The method according to claim 12 , wherein the valve leaflet frame fabric is coupled to the valve ring fabric sleeve.
14. The method according to claim 11 , wherein expanding the prosthetic heart valve comprises expanding the prosthetic heart valve such that the metal segments of the valve ring are curved.
15. The method according to claim 11 , wherein the valve ring fabric sleeve surrounds the valve ring.
16. The method according to claim 11 , wherein the flexible upper skirt frame includes Nitinol.
17. The method according to claim 11 , wherein expanding the prosthetic heart valve comprises expanding the prosthetic heart valve such that the upper skirt frame is shaped so as to define upstream peaks and downstream troughs, and the downstream troughs define the downstream end of the upper skirt frame.
18. The method according to claim 11 , the prosthetic heart valve further includes a lower skirt, which includes a lower skirt fabric coupled to a flexible lower skirt frame.
19. The method according to claim 11 , wherein the native heart valve is a native mitral valve, and wherein expanding the prosthetic heart valve at the native heart valve comprises expanding the prosthetic heart valve at the native mitral valve.
20. The method according to claim 11 , further comprising anchoring the prosthetic heart valve to the heart using a plurality of anchors coupled to the metal segments of the valve ring.