title: Operations on the mitral valve: a time for weighing the issues.
mesh_terms: D002986:Clinical Trials as Topic; D006350:Heart Valve Prosthesis / Q000009:adverse effects / Q000401:mortality; D006801:Humans; D008943:Mitral Valve / Q000601:surgery*; D008944:Mitral Valve Insufficiency / Q000601:surgery; D008946:Mitral Valve Stenosis / Q000601:surgery; D012306:Risk