| 摘要 |
<p>A heart valve (10), of the bi-leaflet or monoleaflet type having improved reductions in drag on blood flow through the fully opened heart valve. The leaflets (14) are pivotally mounted in a heart valve body (12) for movement between closed and opened position. The leaflets (14) have opposed inflow (30) and outflow (32) surfaces. The inflow surface (30) includes a concave region (70) located downstream of the leaflet pivot axis (78), and a convex region (76) located downstream of the concave region (70). The outflow surface (32) of the leaflets (14) is generally convex, at least in that portion directly opposing the concave (70) and convex (76) regions of the inflow surface (30). The angle of leaflet opening is controlled to values ranging between 70° and about 89°.</p> |
