Abstract

Left main coronary artery (LMCA) total occlusion typically presents as anterolateral ST-segment myocardial infarction with or without right bundle branch block with left anterior fascicular block, and ST-segment elevation in aVR. On the contrary to the previously described electrocardiographic pattern we describe a distinct electrocardiographic presentation in a patient with total LMCA occlusion characterized by the presence of complete LBBB co-existing with upsloping ST-segment depression in precordial leads leading to symmetrical, tall, positive T waves, the so called de Winter's sign.

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