Harvard Health Blog
MitraClip: Valve repair device offers new treatment option for some with severe mitral regurgitation
By: Tsuyoshi Kaneko, MD, Contributor Mitral valve regurgitation (MR), a condition in which the mitral valve does not close properly, allowing blood to leak back into the heartís upper chamber, is the most common disease of the heart valves. It can cause symptoms such as cough, fatigue, and trouble breathing. The risk of MR increases with age.