Reoperative cardiac surgery: assessing the risks of secondary procedures.
D000328:Adult; D001021:Aortic Valve / Q000601:surgery*; D001026:Coronary Artery Bypass / Q000379:methods*; D003327:Coronary Disease / Q000601:surgery*; D006801:Humans; D008943:Mitral Valve / Q000601:surgery*; D011446:Prospective Studies; D012306:Risk