Heart valve surgery in patients over the age of 60 years.
D000368:Aged; D005260:Female; D006349:Heart Valve Diseases / Q000209:etiology / Q000601:surgery*; D006350:Heart Valve Prosthesis / Q000401:mortality; D006801:Humans; D008297:Male; D008875:Middle Aged; D011183:Postoperative Complications / Q000401:mortality; D012214:Rheumatic Heart Disease / Q000601:surgery; D012306:Risk