- STEMI defined as chest pain (or epigastric pain) for more than 30 minutes and either: (i) new ST elevation at the J point in two contiguous leads with the cut-off points of ≥0.2 mV in men or ≥0.15 mV in women in leads V2-V3 or ≥0.1 mV in all other leads, (ii) or new or presumed new left bundle branch block (LBBB)