The invention relates to a mechanical prosthetic heart valve, comprising anannular support (12) on which at least two movable flaps (18, 20, 22) and severalarticular extensions (32, 34, 36) are arranged in an articulated manner. Eachflap comprises a central part (38) framed by two lateral wings that each cooperatewith an articular extension by way of an end portion that has an articulation facet.The two articulation facets of each flap together make up a surface area of lessthan 5% of the total outer surface area of the flap.
