Specific Aim 3: This study will evaluate the effect of functional MR on prognosis. Null Hypothesis: The presence and severity of functional MR does not predict the following: 1) long-term survival; and 2) the combined endpoint of death, cardiac transplantation, automatic implantable cardioverter defibrillator (AICD) countershock, hospitalization due to heart failure, or subsequent mitral valve repair or replacement.