Devices, systems and methods for heart valve replacement
A heart valve repair device may include a support configured to extend through a native annulus of a native heart valve, wherein the support comprises an upstream portion and a downstream portion; an annular expandable retainer extending from the upstream portion of the support, and an arm extending from the downstream portion of the support. The annular expandable retainer may include a C-shaped cross-section that is open inwardly. The arm may be configured to reach behind a leaflet of the native heart valve and sandwich the leaflet between the arm and the support.
1. A heart valve repair device comprising:
a support configured to extend through a native annulus of a native heart valve, wherein the support comprises an upstream portion and a downstream portion;
an annular expandable retainer extending from the upstream portion of the support, wherein the annular expandable retainer comprises a plurality of curved ribs integrally formed with the support, the curved ribs being curved in a longitudinal direction, wherein:
a downstream portion of each curved rib of the plurality of curved ribs extends radially outwardly at a first transition;
a first segment of each curved rib curves in an outward and upstream direction to reach a second transition;
a second segment coupled to the first segment at the second transition curves in an upstream and inward direction; and
a tip of each curved rib at a distal end of the second segment curves downstream at the tip;
an arm extending from the downstream portion of the support; and
a prosthetic valve coupled to the support,
wherein, when in an expanded configuration, the annular expandable retainer is configured to engage an inward-facing surface of the native annulus and the support is configured to engage an inward facing surface of native leaflets of the native valve downstream of the annulus, and
wherein the arm, when in the expanded configuration, is configured to extend behind a leaflet of the native leaflets to sandwich the leaflet between the arm and the support.
2. The heart valve repair device of claim 1 , wherein the curved ribs are C-shaped.
3. The heart valve repair device of claim 1 , wherein the arm has a first portion extending from the downstream portion of the support at a first angle and a second portion extending from the first portion at a second angle greater than the first angle, wherein the second portion is configured to engage tissue at a sub annular area of the native annulus.
4. The heart valve repair device of claim 1 , wherein the heart valve repair device is configured to be implanted within or adjacent to a native mitral valve.
5. The heart valve repair device of claim 1 , wherein the arm comprises a plurality of arms, each arm of the plurality of arms extending from the downstream portion of the support, wherein each arm is configured to reach behind the leaflet or another leaflet of the native heart valve and sandwich the leaflet between the arm and the support.
6. The heart valve repair device of claim 1 , further comprising a plurality of rib posts, wherein each rib post of the plurality of rib posts is coupled at a downstream end to the valve support and at an upstream end to the downstream portion of a corresponding curved rib of the plurality of curved ribs, wherein in a radially expanded configuration of the heart valve repair device, each rib post of the plurality of rib posts is generally parallel to a longitudinal axis of the valve support.
7. A heart valve repair device, comprising:
a support configured to extend through a native annulus of a native heart valve, wherein the support comprises an upstream portion and a downstream portion;
an annular expandable retainer coupled to and extending from the upstream portion of the support, wherein the annular expandable retainer comprises a plurality of curved ribs, the curved ribs being curved in a longitudinal direction; and
a prosthetic valve coupled to the support,
wherein the support has a first radial strength and the annular expandable retainer has a second radial strength, wherein the first radial strength is at least 100% greater than the second radial strength.
8. The heart valve repair device of claim 7 , wherein the first radial strength is at least 200% greater than the second radial strength.
9. The heart valve repair device of claim 7 , wherein the first radial strength is at least 300% greater than the second radial strength.
10. The heart valve repair device of claim 7 , further comprising a plurality of arms from the downstream portion of the support, wherein the plurality of arms are configured to reach behind leaflets of the native heart valve and sandwich the leaflet between the arm and the support.
11. The heart valve repair device of claim 7 , wherein the plurality of curved ribs are C-shaped.