View source for File:Recent myocardial infarction demarcation zone.jpg

The demarcation zone of the infarct. In the lower left corner you can see the infarcted myocardium, in the upper right the myocardium is unaffected. The demarcation zone is the border between the affected and unaffected myocardium. If you imagine a line from the upper left to the lower right corner, the demarcation zone approximately follows this line. You can also see red blood cells in the lower left corner.