- Admission within 6 hours of pain onset and EKG with ≥ 1 mm ST-segment elevation in two or more standard leads or ≥ 2 mm ST-elevation in two contiguous chest leads, indicative for transmural ischemia, with or without the development of new Q-waves, with myocardial necrosis proven by enzyme rise (total CPK ≥ 2x the upper normal limit).