What is moderate mitral incompetence? what causes it?

Mitral insufficiency: Mitral insufficiency is synonomous with mitral incompetence. It is when the valve doesn't close properly. This is like a door that doesn't close. The back leak of blood flow can be minor, moderate or major. Various causes of mitral valve insufficiency exist from congenital, through infections, damage to the support structures of the valve and other causes. Minor mitral leak can progress to worse