DANish Study of Optimal Acute Treatment of Patients With ST-elevation Myocardial Infarction

Inclusion Criteria: * Age ≥ 18 years. * Acute onset of chest pain of \< 12 hours' duration. * ST-segment elevation ≥ 0.1 mV in ≥ 2 contiguous leads, signs of a true posterior infarction or documented newly developed left bundle branch block. Culprit lesion in a major native vessel. Exclusion Criteria: * Pregnancy. * Known intolerance of ASA, clopidogrel, heparin or contrast. * Inability to understand information or to provide informed consent. * Haemorrhagic diathesis or known coagulopathy. * Stent thrombosis.