Ischemic Mitral Regurgitation

Abstract

Ischemic mitral regurgitation (MR) is defined as functional MR caused by myocardial ischemia including myocardial infarction and ischemic cardiomyoplasty that results in disturbed left ventricular (LV) geometry. It does not usually coexist with rheumatic heart valve disease, degenerative disease, or congenital defect of the mitral valve (MV) 1) and is associated with excess mortality independently of baseline characteristics and the severity of ventricular dysfunction . The mechanism of regurgitation is independently multifactorial, including LV dilation, LV sphericity, apical and posterior displacement of the papillary muscle, and LV function. Apical and posterior displacement, referred to as tethering, positively correlates with maximal regurgitation area 1, . II. Moderate mitral regurgitation at coronary artery bypass surgery