Heart Valve Surgery is meant to restore the function of your heart valves, which may be diseased or damaged. Several valves can be repaired surgically and not require a valve replacement. A replacement valve may be taken from another human heart, an animal, or it can be a mechanical one. This is more commonly used to repair leaky mitral valves and tricuspid valves. It can also be helpful for repairing prolapse of the mitral valve.