Wellens\' Syndrome is a pattern of electrocardiographic T-wave changes associated with critical, proximal left anterior descending (LAD) artery stenosis associated with a high risk of myocardial infarction and sudden death. We report a case of Wellens\'s syndrome in a 36-year-old patient presenting with intermittent anginal chest pain. The electrocardiogram (ECG) shows a biphasic T-wave at anterior leads and Emergency angiography revealed critical LAD occlusion. It is important for the emergency physicians, to recognize the typical ECG findings of Wellens\' Syndrome, because these characteristic ECG findings are considered as a marker for critical LAD occlusion.