A type of heart valve disease in which the valve between the left heart chambers doesn't close tightly, allowing blood to leak backward.

Mitral valve regurgitation is a common type of heart valve disease. The valve between the left heart chambers doesn't close tightly. This lets blood leak backward in the heart. If the leak is severe, not enough blood can move through the heart or to the rest of the body. Causes include heart attack, heart valve damage, some infections and heart problems present at birth.

Symptoms include shortness of breath, fatigue, and a rapid, pounding or fluttering heartbeat. Some people may have swollen feet or ankles.

Treatment may include regular health checkups, medicines, or surgery to repair or replace the valve. Some people do not need treatment.