This is the left ventricular wall which has been sectioned lengthwise to reveal a large recent myocardial infarction. The center of the infarct contains necrotic muscle that appears yellow-tan. Surrounding this is a zone of red hyperemia. Remaining viable myocardium is reddish-brown.


The effect of left ventricular infarction on cardiac physiologic parameters is shown above in red (normal for comparison in black).