Usually, valves with hereditary-congenital defects are repaired, also, the success of treatment occurs using the repair option has also had a high rate. Mitral valve regurgitation is the backward leakage of blood through the mitral valve during left ventricular systole. A leaky mitral valve allows blood to flow in both directions during systole. Some of the blood flows as it should through the aortic valve of the heart and some of the blood returns into the atrium.