Valvular surgery from the internists' side.
D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D001022:Aortic Valve Insufficiency / Q000503:physiopathology; D001024:Aortic Valve Stenosis / Q000503:physiopathology; D004562:Electrocardiography; D006349:Heart Valve Diseases / Q000401:mortality / Q000601:surgery*; D006801:Humans; D008875:Middle Aged; D008944:Mitral Valve Insufficiency / Q000503:physiopathology; D008946:Mitral Valve Stenosis / Q000503:physiopathology