Acute ST elevation myocardial infarction

**Definition:** ST elevation myocardial infarction (STEMI) is an acute myocardial infarction with developing ST elevation in two contiguous leads of the electrocardiogram (ECG). The criteria of ST elevation are as follows: New ST elevation at the J point in two contiguous leads where these cut points apply: 0.2 millivolt (mV) in men > 40 years, > 0.25mV in men < 40 years, and > 0.15 mV in women.