Prosthetic apparatus for implantation at mitral valve
First Claim
1. A method of implanting a prosthetic apparatus at the native mitral valve region of the heart, the native mitral valve having a native annulus and native valve leaflets, the method comprising:
- positioning a main body of the prosthetic apparatus in a radially compressed state within the native annulus;
deploying at least one ventricular anchor such that an engagement portion of the ventricular anchor is positioned behind one of the native valve leaflets and contacts a ventricular surface of the native annulus;
allowing the main body to expand from the radially compressed state to a radially expanded state within the native annulus; and
deploying at least one atrial anchor such that an engagement portion of the atrial anchor contacts an atrial surface of the native annulus, the engagement portions of the atrial anchor and the ventricular anchor contacting the native annulus at locations on opposite sides of the native annulus;
wherein the native valve leaflets are free to seal around the main body during systole to prevent blood from flowing toward the left atrium, and wherein the native valve leaflets are free to separate from the main body during diastole to allow blood to flow around the main body into the left ventricle.
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Abstract
Embodiments of prosthetics configured for implanting in at the native mitral valve region of the heart include a main body that is radially compressible to a radially compressed state and self-expandable from the compressed state to a radially expanded state. The prosthetic apparatus also comprises at least one ventricular anchor coupled to the main body and disposed outside of the main body with a leaflet-receiving space between the anchor and an outer surface of the main body to receive a native valve leaflet. Methods and apparatus for delivering and implanting the prosthetic valve are also described.
475 Citations
31 Claims
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1. A method of implanting a prosthetic apparatus at the native mitral valve region of the heart, the native mitral valve having a native annulus and native valve leaflets, the method comprising:
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positioning a main body of the prosthetic apparatus in a radially compressed state within the native annulus; deploying at least one ventricular anchor such that an engagement portion of the ventricular anchor is positioned behind one of the native valve leaflets and contacts a ventricular surface of the native annulus; allowing the main body to expand from the radially compressed state to a radially expanded state within the native annulus; and deploying at least one atrial anchor such that an engagement portion of the atrial anchor contacts an atrial surface of the native annulus, the engagement portions of the atrial anchor and the ventricular anchor contacting the native annulus at locations on opposite sides of the native annulus; wherein the native valve leaflets are free to seal around the main body during systole to prevent blood from flowing toward the left atrium, and wherein the native valve leaflets are free to separate from the main body during diastole to allow blood to flow around the main body into the left ventricle. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for implanting a prosthetic apparatus at the native mitral valve region of a heart, the native mitral valve having a native annulus, posterior and anterior native valve leaflets, first and second commissures, a first group of chordae tendinae connected to the native leaflets at the first commissure, and a second group of chordae tendinae connected to the native leaflets at the second commissure, the method comprising:
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positioning a main body of the prosthetic apparatus in a radially compressed state within the native annulus; positioning an atrial anchor of the prosthetic apparatus within the left atrium so as to engage an atrial surface of the native annulus; positioning a first ventricular anchor of the prosthetic apparatus behind the anterior native valve leaflet; positioning a second ventricular anchor of the prosthetic apparatus behind the posterior native valve leaflet; and allowing the main body to self-expand from the radially compressed state to an expanded state contacting inner surfaces of the native valve leaflets. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
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28. A method for implanting a prosthetic heart valve at the native mitral valve region of a heart, the native mitral valve having a native annulus, posterior and anterior native valve leaflets, and first and second commissures, the method comprising:
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inserting a delivery apparatus through the apex of the heart in a direction toward the left atrium, the delivery apparatus containing the prosthetic heart valve in a radially compressed state, the prosthetic heart valve comprising a main body, a plurality of leaflets supported within the main body, an atrial anchor, and first and second ventricular anchors on diametrically opposite sides of the main body; moving an outer sheath proximally relative to an inner sheath of the delivery apparatus such that the outer sheath uncovers the first and second ventricular anchors and then expanding the first and second ventricular anchors away from the main body while the main body and the atrial anchor are retained in a radially compressed state within the inner sheath; positioning the main body within the native annulus, the first and second ventricular anchors behind the anterior and posterior native leaflets, respectively, and the atrial anchor within the left atrium; and moving the inner sheath proximally relative to the main body and the atrial anchor to allow the atrial anchor to expand away from the main body in the left atrium and to allow the main body to radially expand and contact inner surfaces of the native valve leaflets. - View Dependent Claims (29, 30, 31)
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Specification