Substitute cardiac valves. Advantages and disadvantages of four commonly used ones.
D000818:Animals; D001021:Aortic Valve / Q000637:transplantation*; D005069:Evaluation Studies as Topic; D006350:Heart Valve Prosthesis / Q000592:standards*; D006801:Humans; D011474:Prosthesis Design; D013552:Swine; D014021:Tissue Preservation; D014183:Transplantation, Heterologous / Q000009:adverse effects; D014184:Transplantation, Homologous