Prosthetic mitral heart valve

Abstract

Prosthetic mitral heart valve consisting of a support housing (10) having a base ring (15) supporting two flexible leaflets pointing substantially in the direction of the ring axis via a The side posts connected by the arcuate walls (13, 14) of the petal, the free ends of each side post forming the internal support of the leaf petal, wherein the base annulus has a closed non-circular shape in top view, comprising a Common longitudinal axis, but two semi-transverse axes of unequal size. Each jamb lies on the longitudinal axis and forms a transition point from one half of the shape to the other. In order to avoid lower depressions that promote turbulent flow, it is suggested that the common longitudinal axis of the line (17) of the respective jamb tips (18, 19) and the common longitudinal axis of the jamb base ring shape lie in a plane perpendicular to the plane passing through the common longitudinal axis. The plane of the surface (21) formed by the base ring is inclined at an angle of 10° to 20°, preferably 15°, and the wall of greater curvature is different from the support of the wall of greater curvature to be inclined more towards the surface formed by the base ring Smaller area (wall-shaped) lobes set at high angles.

Description

technical field [0001] The present invention relates to a prosthetic mitral heart valve consisting of a supporting shell with a base ring supporting two arcs pointing substantially in the direction of the ring axis, via which two flexible leaflets are fixed side posts connected by shaped walls, the free ends of each side post forming the inner support of the leaflets, wherein viewed from a top view, the base ring has a closed non-circular shape comprising a common longitudinal axis but two Half transverse axes of unequal size, each jamb lies on the longitudinal axis and forms a transition point from one half of the shape to the other. Background technique [0002] One such mitral heart valve is known from WO97 / 49355. In order to avoid a possible mutual functional impairment of the heart and heart valves, it is suggested in this publication that the walls of lesser curvature differ from the walls of greater curvature to support a smaller area arranged at a greater angle of i...

AI Technical Summary

Problems solved by technology

Although the arrangement and structure of the mitral heart valve ensure a favorable physiological flow guidance from the atrium to the ventricle and are in contrast to the embodiments known from the prior art with a circular or symmetrical oval support housing cross-section Compared with heart valves with a smaller structural height, but not completely avoiding the turbulent flow during flow-through, which occurs in the region where the expanded inner wall forms a lower depression (Hinterschneidung) with respect to the direction of flow-through, that is, the edge that is behind the convex and forms With respect to the area of ​​the recess in the flow passage, the recess promotes the formation of undesired turbulence

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