Abstract: The technical result of the invention comprises maintaining the physiological structure of the flow of blood, both in the open and in the closed state of a valve on account of the construction and shape of the cusps. The technical result is achieved in that the heart valve prosthesis comprises a body with a flange, and a closing unit in the form of three cusps mounted in the through opening in the body, wherein each of the cusps has a central rib directed from the centre of the through section of the valve to the body, and convex-concave wings are arranged along the sides of the rib, and cusps are mounted in the body by means of a mounting unit, wherein, in the closed position, the geometry of the valve reproduces the geometry of an actual aortal valve.

Abstract: The device relates to clinical cardiology and cardiovascular surgery.

Abstract: The invention relates to clinical cardiology and cardiovascular surgery. The method for forming a blood flow in research stands and in surgically reconstructed segments of the blood circulation system comprises diagnosing the individual condition of a patient's blood circulation system; measuring the blood flow velocity field in the heart chambers and great vessels; comparing the parameters measured against the physiological norm; determining parameters forming a swirled blood flow; and modeling an individual swirled blood current in the blood circulation system being diagnosed, the streamlined surfaces and guide elements of flow channels of the blood circulation system reconstructed being given shapes conforming to the flow lines of the restored normally swirled blood flow in accordance with formulas: Q ? ( t ) = [ z + Z 0 ? ( t ) ] 2 ( 1.1 ) ? = ? 0 + k ? ( t ) ? z ( 1.