Multicenter International Trial Ring AnnulopLasty

Inclusion Criteria: * Patient requiring a mitral valve repair due to mitral degenerative or functional disease (Note: Patients that underwent concomitant procedures, e.g. coronary artery bypass grafting, are eligible for this study); * Patient (or legal guardian) has signed a study specific informed consent form agreeing to the data collection and follow-up requirements; * Patients are at least 18 years old. Exclusion Criteria: * Patient requires replacement of the aortic, tricuspid or pulmonary valve or has a pre-existing prosthetic valve; * Patient is pregnant or nursing; * Patient has active endocarditis; * Patient is actively participating in another study of an investigational drug or device; * Patients unavailable to follow-up visit (abroad residents, patients affected by neurological disorders...); * Patients who are intravenous drug abusers, alcohol abusers, prison inmates or unable to give informed consent; * Patients with a major non-cardiac evolving disease; * Patients with a life expectancy less than 1 year; * Patients are known to be noncompliant or are unlikely to complete the study; * Any case in which mitral annuloplasty rings are not indicated;