MR images taken when the ventricles of the heart relax and fill with blood and then when the ventricles contract and eject blood to the rest of the body provide a more complete picture of the extent of myocardial scar in patients with ischemic cardiomyopathy, a new study finds. Detection of scar is important because it helps identify patients who are at higher risk of a fatal event, said Dr. James Fernandez, the first author of the study.