The prosthetic heart valve includes a base and one or more heart leaflets (400). At least a portion of the leaflet includes a composite material, the composite material including a polymer substrate (407) and a prestressed reinforcing element (405, 405a) disposed at least partially in the polymer substrate. .人工心臓弁は、基部及び1つ以上の心臓弁尖(400)を含む。弁尖の少なくとも一部分は複合材料を含み、複合材料は、ポリマー基材(407)と、ポリマー基材中に少なくとも一部配置された、プレストレス付与した補強要素(405、405a)と、を含む。