Importance

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Abstract

A mechanical-type, bivalve cardiac valvular prosthesis including a support ring defining a central opening passing therethrough and a pair of relatively rigid leaflets, each having a diametrical straight edge and a curved edge, disposed generally within the central opening. The pair of leaflets are pivotably supported on the support ring to permit the leaflets to move between an open position, in which the leaflets are disposed generally parallel to the axis of the support ring so that said central opening remains substantially cleared, and a closed position, in which the opening is substantially blocked by the leaflets. The leaflets are each pivotably supported by a pair of pivot supports rigidly joined at one end to the inner surface of the support ring and each having an opposite, generally hook-shaped, free end on which the leaflet associated therewith is mounted in a free floating manner so that the leaflets are pivotable about a virtual axis parallel to the diametrical straight edges thereof and passing through the zone of the center of curvature of the hook-shaped ends of the pivot supports.

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First Claim