Abstract
The case report aims to reveal de Winter's electrocardiogram (ECG) pattern as an equivalent to anterior ST-segment elevation myocardial infarction (STEMI). We report a case of a 49-year-old man with a history of smoking who presented to the emergency department with a 1 day history of chest pain that was exacerbated 5 h prior to presentation. Detailed clinical investigations and coronary angiographic characteristics were recorded. The first ECG of the patient was consistent with de Winter syndrome. Acute coronary artery angiography showed that the proximal left anterior descending coronary artery was completely occluded after the first diagonal branch artery was given off. A percutaneous coronary intervention was immediately performed. Our case indicates that early identification and diagnosis of such ECGs and timely reperfusion therapy of de Winter syndrome as a STEMI equivalent are required to improve the prognosis of such patients.