- Patient agrees to undergo all protocol required follow-up examinations and requirements at the investigational site Eight of the most frequently implanted BHV worldwide will be assessed: 1 surgical porcine valve: Mosaic (Medtronic); 4 surgical bovine pericardium valves: Perimount-Carpentier (Edwards), Magna ease (Edwards), Trifecta (St. Jude Medical) and the Mitroflow PRT valve (Sorin); 1 surgical equine valve: 3F-valve or Enable (Medtronic) and 2 percutaneous pericardium valves (TAVI): Corevalve (porcine pericardium - Medtronic) and Sapien valve (bovine pericardium - Edwards).