Valve prosthesis and method for delivery
First Claim
1. A valve prosthesis for implantation into a native cardiac valve site of an individual, the valve prosthesis comprising:
- a valve body; and
a frame supporting the valve body, the frame comprising;
a central portion configured to fit securely within an annulus of the valve site;
a pair of support arms extending from the central portion and configured to extend over and secure a respective native valve leaflet; and
an inlet portion configured to engage the floor of the outflow tract of the native heart atrium and restrict movement of the valve prosthesis in a downstream direction of blood flow at the valve site;
wherein the inlet portion includes a plurality of extensions that protrude in an overall radially outward direction from the frame to circumferentially surround the central portion of the frame,wherein each of the plurality of extensions bends in a first curve from an inflow end of the frame towards an outflow end of the frame, and then bends in a second curve towards the inflow end, wherein first and second curves of the plurality of extensions provide the inlet portion with an s-shape that permits the inlet portion to deform upon implantation and to act in opposition with the pair of support arms to create a seal with the floor of the outflow tract of the native heart atrium after implantation.
1 Assignment
0 Petitions
Accused Products
Abstract
In some embodiments, a valve prosthesis includes an inlet portion that is substantially s-shaped and configured to engage the floor of the outflow tract of the native heart atrium. In some embodiments, a valve prosthesis includes a chordae guiding element configured to reduce bending of the chordae to reduce stress on the chordae during the cardiac cycle. In some embodiments, a valve prosthesis includes a central portion having an hourglass shape configured to pinch a native annulus in order to provide axial fixation of the valve prosthesis within a valve site. In some embodiments, a valve prosthesis includes a frame having an outflow end that is flared to provide a gap between an outflow end of the frame and an outflow end of prosthetic leaflets when the prosthetic leaflets are fully opened.
-
Citations
18 Claims
-
1. A valve prosthesis for implantation into a native cardiac valve site of an individual, the valve prosthesis comprising:
-
a valve body; and a frame supporting the valve body, the frame comprising; a central portion configured to fit securely within an annulus of the valve site; a pair of support arms extending from the central portion and configured to extend over and secure a respective native valve leaflet; and an inlet portion configured to engage the floor of the outflow tract of the native heart atrium and restrict movement of the valve prosthesis in a downstream direction of blood flow at the valve site; wherein the inlet portion includes a plurality of extensions that protrude in an overall radially outward direction from the frame to circumferentially surround the central portion of the frame, wherein each of the plurality of extensions bends in a first curve from an inflow end of the frame towards an outflow end of the frame, and then bends in a second curve towards the inflow end, wherein first and second curves of the plurality of extensions provide the inlet portion with an s-shape that permits the inlet portion to deform upon implantation and to act in opposition with the pair of support arms to create a seal with the floor of the outflow tract of the native heart atrium after implantation. - View Dependent Claims (2, 3, 4, 5)
-
-
6. A valve prosthesis for implantation into a native cardiac valve site of an individual, the valve prosthesis comprising:
-
a valve body; and a frame supporting the valve body, the frame comprising; a central portion configured to fit securely within an annulus of the valve site; a support arm extending from the central portion and configured to extend over and secure a native valve leaflet; and a chordae guiding element inwardly extending from the support arm to be disposed between the support arm and the central portion and configured to engage chordae of the valve site when the frame is expanded, wherein the chordae guiding element is configured to angle the chordae so that the chordae are stretched to restrict movement of the valve prosthesis in an upstream direction of blood flow at the valve site, and wherein the chordae guiding element is configured to reduce bending of the chordae to reduce stress on the chordae during the cardiac cycle. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A valve prosthesis for implantation into a native cardiac valve site of an individual, the valve prosthesis comprising:
-
a valve body; and a frame supporting the valve body, the frame comprising; a central portion configured to fit securely within an annulus of the valve site; a support arm extending from the central portion and configured to extend over and secure a native valve leaflet; and a chordae guiding element directly attached to the support arm, the chordae guiding element extending radially outward from the support arm and being configured to engage chordae of the valve site when the frame is expanded, wherein a first end and a second end of the chordae guiding element are both directly attached to the support arm, wherein the chordae guiding element is configured to angle the chordae so that the chordae are stretched to restrict movement of the valve prosthesis in an upstream direction of blood flow at the valve site, and wherein the chordae guiding element is configured to reduce bending of the chordae to reduce stress on the chordae during the cardiac cycle.
-
Specification