Fig. 2.

Schematic illustration of ST elevation. A) ST segment elevation in transmural or (sub)epicardial ischemia/lesion. The current of injury during systole causes an upward shift of the ST segment. The diastolic injury vector causes a further elevation of the ST segment because the downward shift of the TP and PR segment is artificially depicted as an isoelectric line. B) In (sub)endocardial ischemia/lesion the opposite is observed with a downward shift of the ST segment and elevation of the TP and PR segment. Adapted with permission from: Stroobandt RX, Barold SS, Sinnaeve AF. ECG from basics to essentials: step by step. 1st ed. Chichester: Wiley-Blackwell; 2016.