Methods of implanting a prosthetic mitral heart valve having a contoured sewing ring
First Claim
1. A method of implanting a prosthetic mitral heart valve at a mitral valve annulus, the annulus featuring two spaced apart anterior trigones and defining an annular plane perpendicular to the average blood flow direction through the mitral valve, comprising:
- providing a prosthetic mitral heart valve having an outwardly-directed sewing ring for attaching the heart valve to the mitral valve annulus, the sewing ring having an inflow end and an outflow end, wherein the outflow end includes only two axially-raised portions relative to the remainder of the outflow end that are spaced apart so as to register with the two anterior trigones; and
implanting the prosthetic mitral heart valve in the mitral valve annulus such that the two axially-raised portions are located adjacent the two anterior trigones of the annulus,wherein the prosthetic mitral heart valve includes three axially-oriented commissures extending toward the outflow direction and into the ventricle when the valve is implanted, the first two commissures being located around the heart valve at the same locations as the two axially-raised portions and a third commissure being located equidistant from the first two, wherein the two axially-raised portions tilt the prosthetic mitral heart valve at an angle with respect to the annular plane such that the third commissure angles away from the adjacent ventricular wall and reduces the chance of contact therebetween.
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Accused Products
Abstract
A prosthetic mitral heart valve including a contoured sewing ring that better matches the mitral valve annulus. The sewing ring includes an inflow end and an outflow end, the outflow and having at least one raised portion. There may be two raised portions located approximately 120° apart from each other and designed to register with two anterior trigones of the mitral valve annulus. The sewing ring may be formed by a suture-permeable annular member surrounded by a fabric covering, the annular member desirably being molded of silicone. The raised portion(s) may gently curve upward to a height of about 2 mm above the adjacent portions of the outflow end of the sewing ring. The sewing ring may also be constructed so as to be more flexible around a posterior aspect than around an anterior aspect to accommodate calcified tissue more commonly found around the posterior annulus. The contoured sewing ring can be combined with various types of heart valve including bioprosthetic and mechanical valves. A bioprosthetic heart valve of the present invention may include a support stent having three outflow commissures alternating with three inflow cusps, with two of the commissures being located at the same place as two raised portions of the sewing ring. A method of implant includes tilting the prosthetic heart valve in the mitral annulus so that a posterior commissure angles away from the ventricular wall and reduces the chance of contact therebetween.
55 Citations
12 Claims
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1. A method of implanting a prosthetic mitral heart valve at a mitral valve annulus, the annulus featuring two spaced apart anterior trigones and defining an annular plane perpendicular to the average blood flow direction through the mitral valve, comprising:
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providing a prosthetic mitral heart valve having an outwardly-directed sewing ring for attaching the heart valve to the mitral valve annulus, the sewing ring having an inflow end and an outflow end, wherein the outflow end includes only two axially-raised portions relative to the remainder of the outflow end that are spaced apart so as to register with the two anterior trigones; and implanting the prosthetic mitral heart valve in the mitral valve annulus such that the two axially-raised portions are located adjacent the two anterior trigones of the annulus, wherein the prosthetic mitral heart valve includes three axially-oriented commissures extending toward the outflow direction and into the ventricle when the valve is implanted, the first two commissures being located around the heart valve at the same locations as the two axially-raised portions and a third commissure being located equidistant from the first two, wherein the two axially-raised portions tilt the prosthetic mitral heart valve at an angle with respect to the annular plane such that the third commissure angles away from the adjacent ventricular wall and reduces the chance of contact therebetween. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification