Paired LV short axis plane CMR images from three patients with acute STEMI obtained shortly after PCI. The left column shows the T2* maps with areas of hemorrhage depicted in red (T2*<20 ms). The right column shows the delayed contrast enhanced images. Enhancing myocardium indicates the extent of infarcted tissue while MVO is demonstrated by subendocardial non-enhancement. In Patient A the LAD was reperfused - the distribution of hemorrhage and MVO within the anterior infarct are similar. In Patient B the RCA was reperfused - Both subendocardial hemorrhage and MVO are present in the inferior wall. In Patient C the OM was involved - There is a partial-thickness lateral wall infarct, but no hemorrhage or MVO.