Devices, systems, and methods for retaining a native heart valve leaflet
View Patent ↗Devices, systems and methods retain a native heart valve leaflet to prevent retrograde flow. The devices, systems, and methods employ an implant that, in use, rests adjacent a valve annulus and includes a retaining structure that is sized and shaped to overlay at least a portion of one or more native valve leaflets. The retaining structure retains the leaflet or leaflets it overlays, to resist leaflet eversion and/or prolapse. In this way, the implant prevents or reduces regurgitation. The implant does not interfere significantly with the opening of and blood flow through the leaflets during periods of antegrade flow.
1. A method for retaining a native mitral heart leaflet to resist retrograde flow comprising
providing an implant that retains a native mitral heart valve leaflet to resist retrograde flow comprising a scaffold sized and configured to rest adjacent all or a portion of a native mitral heart valve annulus, at least a portion of the scaffold defining a pseudo-annulus and including a retaining structure near or within the pseudo-annulus that is sized and shaped to overlay at least a portion of one or more native mitral valve leaflets, the scaffold further including spaced-apart struts sized and configured to contact tissue near or within the mitral heart valve annulus to brace the retaining structure to resist leaflet eversion and/or prolapse,
establishing an intravascular access path that extends from a right atrium through a septum and into a left atrium,
introducing the implant through the intravascular path into the left atrium, and
resisting leaflet eversion and/or prolapse by locating the scaffold adjacent all or a portion of the native mitral heart valve annulus to define a pseudo-annulus with the retaining structure overlaying at least a portion of one or more native mitral valve leaflets and with the spaced-apart struts contacting tissue near or within the mitral heart valve annulus to brace the retaining structure.
2. A method according to claim 1
wherein the retaining structure comprises a wire-form structure.
3. A method according to claim 1
wherein at least one of the struts comprises a wire-form structure.
4. A method according to claim 1
wherein the retaining structure and the struts each comprises a wire-form structure.
5. A method according to claim 1
wherein at least one of the struts carries a structure sized and configured to increase a surface area of contact with tissue at, above, or below the annulus.
6. A method according to claim 1
further including at least one structure appended to the scaffold and being sized and configured to contact tissue at, above, or below the heart valve annulus to stabilize the scaffold.
7. A method according to claim 1
wherein the scaffold includes a material and a shape to provide a spring-like bias to enable compliant contact with tissue near or within the heart valve annulus.
8. A method according to claim 1
wherein the struts reshape the heart valve annulus.
9. A method according to claim 1
wherein the struts apply tension to tissue to reshape the heart valve annulus.
10. A method according to claim 1
wherein the struts displace tissue to reshape the heart valve annulus.
11. A method according to claim 1
further including a second heart valve treatment element appended to the scaffold to affect a heart valve function.
12. A method according to claim 1
wherein the second heart valve treatment element includes means for reshaping the heart valve annulus for leaflet coaptation.
13. A method according to claim 1
wherein the second heart valve treatment element includes means for separating tissue along an axis of the heart valve annulus for leafleted coaptation.
14. A method according to claim 1
wherein the introducing comprises constraining the implant within a catheter in a collapsed condition.
15. A method according to claim 14 ,
wherein the locating comprises expelling the implant from the catheter to free the implant from the catheter.