In order to accelerate border crossing between basic research and clinical research in acute myocardial infarction, it is necessary to easily use clinical and biological data. That is the reason why it is very important to create a clinical, biological and pathologic database of acute myocardial infarction, mainly prospective. All data are from patients treated in 5 centers in Shanghai，including Zhongshan Hospital of Fudan University, Shanghai Renji Hospital，Shanghai Tenth People's Hospital，Shanghai First People's Hospital, and Shanghai Tongji Hospital.

Inclusion Criteria:

• Acute myocardial infarction was diagnosed based on the Fourth Universal Definition of Acute myocardial infarction criteria. The term acute myocardial infarction should be used when there is acute myocardial injury with clinical evidence of acute myocardial ischaemia and with detection of a rise and/or fall of cTn values with at least one value above the 99th percentile URL and at least one of the following: Symptoms of myocardial ischaemia; New ischaemic ECG changes; Development of pathological Q waves; Imaging evidence of new loss of viable myocardium or new regional wallmotion abnormality in a pattern consistent with an ischaemic aetiology; Identification of a coronary thrombus by angiography or autopsy.

Exclusion Criteria:

• life expectancy of less than 12 months
• malignant tumor
• pregnancy or plans of pregnancy in the one year
• any anticoagulation therapy such as heparin within 24 hours of baseline blood sampling

Patients with acute myocardial infarction will be enrolled into the study based on the inclusion/exclusion criteria. No randomisation will be performed.