초록 ▼

A remodeling mitral annuloplasty ring with a reduced anterior-to-posterior dimension to restore coaptation between the mitral leaflets in mitral valve insufficiency (IMVI). The ring has a generally oval shaped body with a major axis perpendicular to a minor axis, both perpendicular to a blood flow a

A remodeling mitral annuloplasty ring with a reduced anterior-to-posterior dimension to restore coaptation between the mitral leaflets in mitral valve insufficiency (IMVI). The ring has a generally oval shaped body with a major axis perpendicular to a minor axis, both perpendicular to a blood flow axis. An anterior section lies between anteriolateral and posteriomedial trigones, while a posterior section defines the remaining ring body and is divided into P1, P2, and P3 segments corresponding to the three scallops of the same nomenclature in the posterior leaflet of the mitral valve. The anterior-to-posterior dimension of the ring body is reduced from conventional rings; such as by providing, in atrial plan view, a pulled-in P3 segment. Viewed another way, the convexity of the P3 segment is less pronounced than the convexity of the P1 segment. In addition, the ring body may have a downwardly deflected portion in the posterior section, preferably within the P2 and P3 segments. The downwardly deflected portion may have an apex which is the lowest elevation of the ring body and may be offset with respect to the center of the downwardly deflected portion toward the P1 segment. A sewing cuff may have an enlarged radial dimension of between 5-10 cm, or only a portion of the sewing cuff may be enlarged.

대표청구항 ▼

What is claimed is: 1. An annuloplasty ring for implantation in a mitral valve annulus designed to correct ischemic mitral valve insufficiency, the native mitral valve being located at the orifice between the left atrium and left ventricle and having two leaflets which coapt to form a one-way valve

What is claimed is: 1. An annuloplasty ring for implantation in a mitral valve annulus designed to correct ischemic mitral valve insufficiency, the native mitral valve being located at the orifice between the left atrium and left ventricle and having two leaflets which coapt to form a one-way valve within an overall orifice area, the annuloplasty ring comprising:a generally oval shaped ring body having a metallic core and oriented about a central flow axis, the flow axis defining an upward direction and a downward direction, the downward direction corresponding to the direction of blood flow through the mitral valve annulus from the left atrium to the left ventricle, and wherein in plan view as seen along the flow axis the ring body has a major axis perpendicular to a minor axis, the major and minor axes being perpendicular to the flow axis,the ring body having, in atrial plan view, an anterior section generally defined between an anterolateral trigone and a posteromedial trigone, and a posterior section around the remaining periphery of the ring body and between trigones, the posterior section being divided into three sequential segments, (P1), (P2), and (P3), starting from the anterolateral trigone and continuing in a counterclockwise direction, wherein the minor axis intersects both the anterior section and the (P2) segment of the posterior section, and wherein a portion of the posterior section deflects downward with respect to the remaining sections of the ring body to a single apex; and,wherein, given a predetermined major axis dimension, the ratio of the minor axis dimension to the major axis dimension is less than 3:4.