Late follow-up studies on flexible leaflet prosthetic valves.
D001024:Aortic Valve Stenosis / Q000601:surgery*; D005500:Follow-Up Studies; D006334:Heart Function Tests; D006350:Heart Valve Prosthesis / Q000009:adverse effects; D006801:Humans; D008297:Male; D008875:Middle Aged; D012828:Silicones
D012828:Silicones