Abstract
A 54-year-old man presented to the emergency department with chest pain and electrocardiogram (ECG) changes of acute ST-segment elevation myocardial infarction (STEMI) and junctional ST-depression with tall symmetrical T-waves (de Winter T-wave) in the lateral and inferior leads. Emergent coronary angiography revealed a culprit lesion in the gigantic obtuse marginal artery (OM). This case demonstrates the de Winter T-wave can occur in a patient with an acute occlusion of OM. Emergency physicians, ambulance staff, cardiologists and all involved in STEMI networks should familiarize themselves with this unusual ECG pattern and consider transferring patients for urgent angiography and reperfusion therapy.
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