Time for a Diagnostic Paradigm Shift From STEMI/NSTEMI to OMI/NOMI

The investigators hypothesize that occlusion myocardial infarction(MI)/non-occlusion MI approach to MI treatment will better predict acute coronary occlusion on coronary angiography, better limit infarct size, better preserve left ventricular function and result in lower long-term adverse cardiac events (all cause mortality, all cause rehospitalization) compared to standard ST-elevation/non-ST-elevation MI paradigm.

Inclusion criteria * Age \>18 years * ECG and/or clinical diagnosis of acute myocardial infarction Exclusion criteria * Active pregnancy or a suspicion of pregnancy * Rejection or withdrawal of consent * Failure to acquire any of the pre-participation ECGs * Non-ischemic myocardial injury * Application of thrombolytic therapy instead of primary PCI * Re-occlusion of the culprit lesion after intervention\* * New vessel occlusion during hospital stay\* * Exclusion from final analyses.