Tehran University of Medical Sciences The Research in Heart Yield and Translational Medicine (RHYTHM) 3115-7270 17 4 2022 10 31 249 251 EN Burak Acar Department of Cardiology, Faculty of Medicine, Kocaeli University Ahmet Arikan 2Kocaeli University Medical Faculty, Department of Cardiovascular Surgery, Kocaeli, Turkey Zeki Talas Kocaeli University Medical Faculty, Department of Cardiovascular Surgery, Kocaeli, Turkey Umut Celikyurt Kocaeli University Medical Faculty, Department of Cardiology, Kocaeli, Turkey Muhip Kanko Kocaeli University Medical Faculty, Department of Cardiovascular Surgery, Kocaeli, Turkey 2022 06 06 2022 10 29 Coronary artery perforations and dissections, associated with cardiac tamponade or acute vessel closure, are life-threatening complications of percutaneous coronary intervention. In some cases, subepicardial hematomas could occur and compress the vessel. A 59-year-old woman was admitted to our hospital with chest pain and was diagnosed with non–ST-elevation myocardial infarction. Coronary angiography showed the total occlusion of the diagonal artery. During the intervention, left main coronary artery dissection and intramural hematoma occurred as coronary complications. The left main coronary artery was stented; however, the extension of the hematoma through the ostium of the left anterior descending artery caused further complications. The patient underwent an urgent coronary artery bypass graft surgery and was discharged on the seventh postoperative day. https://rhythm.tums.ac.ir/index.php/jthc/article/view/1657 https://rhythm.tums.ac.ir/index.php/jthc/article/download/1657/1037