title: Heterograft aortic-valve replacement.
mesh_terms: D000818:Animals; D001027:Aortography; D002417:Cattle; D002932:Cineangiography; D005500:Follow-Up Studies; D006350:Heart Valve Prosthesis; D006351:Heart Valves / Q000637:transplantation; D006801:Humans; D013552:Swine; D014015:Tissue Banks; D014181:Transplantation Immunology; D014183:Transplantation, Heterologous