Represents the results of a clinical trial implantation xenopericardial prosthesis mounted on a frame of variable stiffness "Tiara" in the aortic position. Prosthesis implanted in a single-row suture cubcoronary supraannulary position. Implantation performed two patients 71 and 75 years with a good clinical outcome. According to the control echocardiography peak gradients at rest were 9-15 mm Hg. According to the results of a clinical trial prosthesis can be recommended for implementation in everyday clinical practice.

More than 50 years have passed since the first successful heart valve replacement. Since then, many types of mechanical prostheses have been introduced. The prosthesis choice for the replacement of an affected valve is a major concern in valvular surgery. The introduction of a new heart valve prosthesis requires accurate data collection and data processing for a long follow-up period. In present article we sought to compare modern commercial available bileaflet foreign mechanical valve prosthesis for their long follow-up with Russian mechanical valve for aortic and mitral valve replacement.