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Coronary artery perforation (CAP) is an infrequent and life-threatening complication of percutaneous coronary intervention (PCI), requiring prompt intervention. There is insufficient data about the prognosis and management of CAP in patients with acute coronary syndrome (ACS). The aim of this study was to investigate the management of CAP in patients with ACS.The results of 25 patients with CAP were retrospectively analyzed.Of the 25 patients, 14 patients (56%) had ACS. According to the Ellis classification, the grade of perforation was type-I in 8 (32%) patients, type-II in 6 (24%) patients and type-III in 11 (44%) patients. Prolonged balloon inflation was performed to 20 (80%) cases of CAP. It successfully sealed the perforation in three cases of type-I, five cases of type-II CAP and in seven cases of type-III CAP. Seven patients underwent covered stent implantation. Emergent CABG was required in two patients with type-III CAP. In-hospital mortality was not observed in the patients.The outcomes of CAP in patients with ACS were similar to patients with stable coronary disease. The continuation of anti-platelet agents after the successful management of CAP may be encouraged in these patients.