Early thrombosis of a porcine bioprosthesis in the aortic valve position.
D001024:Aortic Valve Stenosis / Q000601:surgery*; D001705:Bioprosthesis; D006331:Heart Diseases / Q000209:etiology*; D006350:Heart Valve Prosthesis; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000209:etiology*; D013927:Thrombosis / Q000209:etiology*; D013997:Time Factors