| 摘要 |
<p>Heart valve for implantation as a surgical prosthesis including a valve housing having an orifice ring and three pairs of structural short and long projections extending inwardly and centrally within the plane of the orifice ring. A like plurality of leaflet occluders pivot between closed and open positions providing for uniform hemodynamic flow of blood through the heart valve. Each of the leaflet occluders is substantially one-third of a circle and includes on a proximal surface side having inner and outer pivot sockets of oval concentricity. The pivot sockets of each leaflet occluder freely engage about short and long projections extending inwardly from the valve ring and substantially equally spaced within three sectors of the valve orifice. The short and long projections also function as closed position stops and open position stops during symmetrical and synchronous movement of the leaflet occluders.</p> |
