Clinical Research Directory

Inclusion Criteria: * The patient meets the diagnostic criteria for STEMI (refer to the "Diagnosis and Treatment Guidelines for Acute ST Segment Elevation Myocardial Infarction (2019)") * The onset time is less than 12 hours * Agree to perform direct PCI * Heart function (Killip class) ≤ Level III * There are no direct PCI contraindications. Exclusion Criteria: * Patients allergic to tirofiban or/and aspirin * Patients with a history of intracranial hemorrhage * Patients with stroke/transient ischemic attack within six months * Patients who have taken oral anticoagulants within 30 days before admission and cannot stop taking them * Patients receiving clopidogrel or ticagrelor from other manufacturers or formulations due to directive events * Patients who have received or plan to undergo fibrinolysis therapy within 24 hours * Patients with a history of major surgery within 30 days, or those who plan to undergo major surgery during the study process * Patients with a history of gastrointestinal bleeding within 6 months, or those with severe bleeding disorders or tendencies towards bleeding * Patients with severe combined liver and kidney dysfunction * Refuse to participate in this experiment.