What is Mitral Regurgitation?
Mitral regurgitation (MR) is the abnormal reverse flow of blood due to leakage through the mitral valve during each heartbeat. A common heart valve disease, MR affects about 5% of Western populations, and approximately 1% of patients will require medical treatment. MR can be caused by an abnormal mitral valve, called degenerative MR (DMR), or an abnormal ventricle, called functional MR (FMR). DMR is preferably treated with valve repair, while FMR often requires valve replacement.