左心室壁纵切面可见一大块新近的心肌梗死区，其中坏死心肌呈黄褐色，周围是红色的充血区，其余的正常心肌呈红褐色。
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.