title: How risky is mitral valve surgery for an 85-year-old woman?
mesh_terms: D000367:Age Factors; D000369:Aged, 80 and over; D005260:Female; D006349:Heart Valve Diseases / Q000601:surgery*; D006801:Humans; D008943:Mitral Valve / Q000601:surgery*; D011183:Postoperative Complications; D012737:Sex Factors