title: Risk of prosthetic thrombosis with a porcine heterograft valve in the aortic position: case reports.
mesh_terms: D001021:Aortic Valve / Q000601:surgery*; D001705:Bioprosthesis / Q000009:adverse effects*; D006350:Heart Valve Prosthesis / Q000009:adverse effects*; D006801:Humans; D008297:Male; D008875:Middle Aged; D013927:Thrombosis / Q000209:etiology*