Heart Disease
Heart Valve Disease See All Heart Valve Diseases in Heart Valve Disease Heart valves can malfunction on one of two ways: They can fail to close completely, allowing blood to flow backward, or they can become damaged, limiting blood flow. ...more Mitral Valve Prolapse in Heart Valve Disease The mitral valve sits between the left atrium and left ventricle. It's job is to keep blood flowing in the right direction. Mitral valve prolapse is the bulging of the valve causing blood to leak backwards.