The invention relates to a mechanical prosthetic heart valve, comprising an annular support (12) on which at least two movable flaps (18, 20, 22) and several articular extensions (32, 34, 36) are arranged in an articulated manner. Each flap included in a central part (38) framed by two lateral wings that have an articular extension by way of an end that has an articulation facet. The two articulation facets of each flap together make up a surface area of less than 5% of the total surface area of the flap. The invention relates to a mechanical prosthetic heart valve which comprises an annular support (12) on which are arranged, articulated, at least two movable flaps (18, 20, 22) and several articular extensions (32, 34, 36). Each flap comprises a central portion (38) flanked by two lateral wings cooperating each with an articular extension via an end portion which has a hinge facet. The two articulation facets of each component totaling less than 5% of the total outer surface of the shutter.The invention relates to a mechanical prosthetic heart valve, comprising anannular support (12) on which at least twomovable flaps (18, 20, 22) and several articular extensions (32, 34, 36) arearranged in an articulated manner. Each flap comprisesa central part (38) framed by two lateral wings that each cooperate with anarticular extension by way of an end portion that has anarticulation facet. The two articulation facets of each flap together make upa surface area of less than 5% of the total outer surfacearea of the flap.L'invention concerne une valve cardiaque prothétique mécanique qui comprend unsupport annulaire (12) surlequel sont agencés, de façon articulée, au moins deux volets mobiles (18, 20,22) et plusieurs extensions articulaires (32, 34, 36).Chaque volet comportant une partie centrale (38) encadrée par deux aileslatérales coopérant chacune avec une extension articulairepar l'intermédiaire d'une portion terminale qui possède une f
