Factors influencing change in the operative technics for mitral valve disease.
D006348:Cardiac Surgical Procedures / Q000401:mortality*; D005112:Extracorporeal Circulation; D006350:Heart Valve Prosthesis; D006801:Humans; D008722:Methods; D008944:Mitral Valve Insufficiency / Q000601:surgery*; D008946:Mitral Valve Stenosis / Q000601:surgery*