The arterial supply of the posteromedial papillary muscle of the left ventricle arises from the terminal branches of the right or circumflex arteries, depending on the distribution of these arteries. The anterolateral papillary muscle of the left ventricle is supplied primarily by one or more branches from the left anterior descending coronary artery, although it may also be supplied by circumflex marginal branches. The anterolateral papillary muscle is supplied only by the branches of the left coronary artery. However, in our case, the patient demonstrated a total occlusion of the right coronary artery that resulted in acute inferior myocardial infarction with a complete anterolateral papillary muscle rupture of the left ventricule as well as acute mitral insufficiency.