Mitral prosthesis and methods for implantation
First Claim
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1. A mitral valve prosthesis for implantation in an annulus of a native mitral valve, the mitral valve prosthesis comprising:
- a frame comprising;
an inner support structure including an expandable inflow section formed of a plurality of cells and configured to expand within and support against a left atrium and an expandable outflow section formed of a plurality of cells and configured to expand within and support against the native mitral valve annulus,wherein the expandable inflow section has an asymmetrical shape configured to accommodate an anterior horn of the atrium and ensure axial fixation of the valve prosthesis against the left atrium; and
an outer support structure coupled to the inner support structure including first and second commissure posts and first and second engagement arms, wherein a first end of the first engagement arm is attached to the first commissure post and a second end of the second engagement arm is attached to the first commissure post; and
a valve including a valve leaflet, the valve being attached to the frame within an interior area of the inner support structure,wherein the first and second commissure posts are parallel to a longitudinal axis of the expandable outflow section of the inner support structure.
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Abstract
A mitral valve prosthesis and methods for implanting the prosthesis transapically (i.e., through the apex of the heart), transatrially (i.e., through the left atrium of the heart), and transseptally (i.e., through the septum of the heart). The prosthesis generally includes a self-expanding frame and two or more support arms. A valve prosthesis is sutured to the self-expanding frame. Each support arm corresponds to a native mitral valve leaflet. At least one support arm immobilizes the native leaflets, and holds the native leaflets close to the main frame.
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15 Claims
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1. A mitral valve prosthesis for implantation in an annulus of a native mitral valve, the mitral valve prosthesis comprising:
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a frame comprising; an inner support structure including an expandable inflow section formed of a plurality of cells and configured to expand within and support against a left atrium and an expandable outflow section formed of a plurality of cells and configured to expand within and support against the native mitral valve annulus, wherein the expandable inflow section has an asymmetrical shape configured to accommodate an anterior horn of the atrium and ensure axial fixation of the valve prosthesis against the left atrium; and an outer support structure coupled to the inner support structure including first and second commissure posts and first and second engagement arms, wherein a first end of the first engagement arm is attached to the first commissure post and a second end of the second engagement arm is attached to the first commissure post; and a valve including a valve leaflet, the valve being attached to the frame within an interior area of the inner support structure, wherein the first and second commissure posts are parallel to a longitudinal axis of the expandable outflow section of the inner support structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification