Inclusion criteria:  Older than 18 years old. patients with ongoing (within 12 hours after onset of symptoms) STEMI admitted for coronary angiography and receiving preloading dose of aspirin, heparin and P2Y12 inhibitor  Exclusion criteria:  Patients with thrombolysis treatment before angiography Patients with cardiac arrest without ST-segment elevation on ECG after resuscitation Patients with myocardial infarction outside of acute phase (pain lasting more 12 hours) Patients with mental disease Patients not living in France