Aortic valve disease in the elderly.
D000368:Aged; D001022:Aortic Valve Insufficiency / Q000175:diagnosis* / Q000601:surgery; D001024:Aortic Valve Stenosis / Q000175:diagnosis* / Q000601:surgery; D001705:Bioprosthesis; D002114:Calcinosis / Q000175:diagnosis; D006328:Cardiac Catheterization; D002908:Chronic Disease; D004452:Echocardiography; D006337:Heart Murmurs; D006350:Heart Valve Prosthesis; D006801:Humans