Eighteen-lead electrocardiogram was recorded immediately after admission, and vital signs were checked. Blood was drawn immediately after admission for assay of cardiac enzymes, troponin, and other related biochemical and routine testing items. In addition, 100 mg of aspirin (Bayer, Germany; 100 mg/tablet) and 180 mg of ticagrelor (Belinda Tablets, Astra Zeneca; 90 mg/tablet) were orally administered to patients in these three groups. Emergency coronary angiography and PCI were performed. If thrombi were found, a thrombus aspiration catheter was used to aspirate them (10 patients, 6 patients and 9 patients in groups A, B, and C, respectively). Tirofiban hydrochloride (10 µg/kg) was injected into the coronary artery in patients in groups A and C. After PCI, 0.075 µg/kg·min of tirofiban hydrochloride was continuously pumped into the vein for 24 hours7. Drug-eluting stents were used for all patients. Merely the culprit vessel was treated during the emergency. If a non-culprit vessel needed to be treated, selected PCI was performed 10 to 14 days later. In addition, 100 mg/d of aspirin and 90 mg/d of ticagrelor were given twice orally and continuously in patients in all three groups. Subsequently, DAPT was applied for at least 12 months. Furthermore, -receptor blockers, statins, hypoglycemic agents, and angiotensin converting enzyme inhibitors were continuously administered.9

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