Heart valve prosthesis with collapsible valve and method of delivery thereof
A valve prosthesis is adapted to operate in conjunction with native heart valve leaflets. The prosthesis includes an annulus and a skirt extending from the annulus. The skirt may be configured to be positioned through a native heart valve annulus, and the skirt may be movable between an open configuration permitting blood flow through the skirt and a closed configuration blocking blood flow through the skirt in cooperation with opening and closing of the native heart valve leaflets.
1. A prosthetic cardiac valve support device comprising:
an annular support element configured for positioning at or near a native heart valve annulus;
at least two valve support extensions shaped to extend through commissures of the native heart valve for supporting a flexible valve; and
at least two anchoring extensions:
attached at one end to said annular support element, and extending in an opposite direction towards an unattached end;
in a form of hooks shaped for anchoring said annular support element to tissue;
all of the anchoring extensions being adapted to extend through commissures of a native heart valve without interfering with movement of native heart valve leaflets; and
the anchoring extensions shaped to prevent said annular support element from shifting upstream relative to the native heart valve annulus.
2. The device of claim 1 in which said anchoring extensions are shaped to extend below an annulus of the native heart valve.
3. The device of claim 1 in which said anchoring extensions are attached to approximately opposing edges of the annular support element.
4. The device of claim 1 in which said anchoring extensions are attached to said annular support element at non-opposing positions around said annular support element, conforming to positions of commissures of the native heart valve.
5. The device of claim 1 in which all of said anchoring extensions are shaped to extend through commissures of a native heart valve and extend radially outward from a valve center, further than native heart valve leaflets, without interfering with closing of native heart valve leaflets.
6. The device of claim 1 in which said valve support extensions are connected to each other at tips of the valve support extensions distal from an attachment of said support extensions to said annular support element.
7. The device of claim 1 in which said anchoring extensions comprises a loop at a tip of said anchoring extensions.
8. The device of claim 1 , wherein a part of said annular support element is a D-shaped annulus element conforming to a shape of a mitral valve annulus.
9. The device of claim 1 , wherein said annular support element is elastically deformable.
10. The device of claim 1 , in which said unattached end of said anchoring extensions are shaped to extend through the native heart valve annulus and are curved in a direction from a center of the native heart valve annulus toward heart walls.
11. A method for providing support for a cardiac valve comprising:
placing an annular support element for a cardiac valve upstream of a native heart valve annulus;
extending at least two valve support extensions shaped to extend through commissures of the native heart valve for supporting a flexible valve;
extending at least two anchoring extensions:
attached at one end to said annular support element and extending in an opposite direction towards an unattached end;
in a form of hooks shaped for anchoring said annular support element to tissue; and
all of the anchoring extensions being adapted to extend through commissures of a native heart valve without interfering with movement of native heart valve leaflets,
so as to prevent said annular support element from shifting upstream relative to the native heart valve annulus.
12. The method of claim 11 in which the anchoring extensions are anchored in tissue.
13. The method of claim 11 in which the anchoring extensions extend below an annulus of the native heart valve.
14. The method of claim 11 in which said anchoring extensions are extended through commissures of a native heart valve without interfering with movement of native heart valve leaflets.
15. The method of claim 11 in which all of said anchoring extensions are extended through commissures of a native heart valve and extended radially outward from a valve center, further than native heart valve leaflets without interfering with closing of native heart valve leaflets.
16. The method of claim 11 in which the cardiac valve comprises a flexible valve, and further comprising extending at least two valve support extensions for supporting said flexible valve through commissures of the native heart valve.
17. The method of claim 11 in which said placing said annular support element upstream of a native heart valve annulus comprises expanding said annular support element radially like a stent.