Optimizing Infarct Size by Transforming Emergent Stenting Into an Elective Procedure Study

Inclusion Criteria: * chest pain for \>30 min with ST-segment elevation of one mm or more in 2 or more contiguous ECG leads or with presumably new left bundle-branch block * admission either within 12 h of symptom onset or between 12 and 24 h with evidence of continuing ischaemia Exclusion Criteria: * the exclusion criteria will include history of bleeding diathesis or documented allergy/intolerance or contraindication to clopidogrel or ticlopidine or prasugrel * inability to assume an oral P2Y12 receptor blocker on a consecutive daily basis for a minimum of 6 months, or to heparin or aspirin * uncontrolled hypertension (systolic or diastolic arterial pressure \>180 mmHg or 120, respectively, despite medical therapy) * limited life expectancy, e.g. neoplasms, others * inability to obtain informed consent * pregnancy * patients were not enrolled if they were clinically unstable, presented with severe arrhythmia, or had known contraindications to CMR (claustrophobia, pacemakers, or implantable defibrillator devices)