New balloon treatment could change how heart attacks are treated

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: 1. . Age of Patients ≥18 years old; 2. Acute myocardial infarction patients with onset symptoms\<48 hours require emergency PCI; 3. . Diagnosis: Chest pain and other ischemic symptoms accompanied by ST segment elevation in at least two adjacent leads on electrocardiogram (① V2 or V3 lead: male\<40 years ≥ 0.25mV, ≥ 40 years ≥ 0.2mV; Female ≥1.5mV；② Other leads ≥ 1mV), or new left bundle branch block occurs; 4. Criminal blood vessels with clear requirements for emergency PCI; 5. Coronary artery in situ lesions, with a visual reference lumen diameter of ≥ 2mm and ≤ 4mm; Lesion's length\<40mm； 6. After thrombus aspiration and pre dilation, the lesion stenosis is ≤ 50% and there is no C-type or above dissection. 7. He/she or his/her legal representative voluntarily participates in this study and signs an informed consent form. Exclusion Criteria: 1. The patient has allergies or contraindications to the following medications: Heparin, Aspirin, Clopidogrel, Prasugrel, Ticagrelor, Cilostazol, Indobufen, Contrast Medias (Patients with clear contrast agent allergies such as rash but can be controlled with effective drugs such as glucocorticoids and diphenhydramine in advance can be selected); 2. The patient has active pathological bleeding; 3. History of significant gastrointestinal or urogenital bleeding or bleeding tendency within 3 months prior to surgery, known coagulation disorders (including heparin induced thrombocytopenia); 4. Patients who are pregnant or have the intention to become pregnant during the period of research; 5. Non cardiogenic combined lesions show an expected life expectancy of less than one year; 6. Left main trunk's stenosis ≥ 50% 7. History of coronary artery bypass grafting in the past; 8. Intubation or mechanical ventilation status; 9. . Cardiogenic Shock 10. . Without signature on informed consent