regardless of ST-segment changes in other ECG leads. This association was strong when aVR was elevated above the 1.5 mm or 1 mm cut-off points in the setting of anterior or inferior acute STEMI ...

A 12-lead ECG with posterior leads V7–9 was ... The patient suffered posterolateral myocardial infarction. Between 15 and 20% of myocardial infarctions manifest as posterior infarction.

A STEMI is generally defined as an Electrocardiogram (EKG) with ST elevation of greater than 1 mm in 2 or more contiguous leads. It has also been defined as a "new" Left Bundle Branch Block (LBBB ...