Figure 4.

Cardiac MR performed following a late presentation ST elevation myocardial infarction. Short axis late gadolinium enhancement sequence performed at mid left ventricle level showing an extensive area of microvascular obstruction (MVO) within the septal wall extending onto the anterior wall (white arrow heads) with only a very limited rim of late enhancement (interrupted white arrow). Note the marked difference in appearance between the nulled normal myocardium of the lateral wall (white arrow) and the site of MVO within the septal wall. The measured ejection fraction was 27%.