Angiographic validation of magnetic resonance assessment of myocardium at risk in non-ST-elevation myocardial infarction.

In the setting of acute myocardial ischemia, the hypoperfused portion of the myocardium is in danger of becoming irreversibly injured. This portion is called the area at risk (AAR). It is of clinical interest to be able to estimate the AAR for further evaluation and improvement of different revascularization strategies.