An uncommon case of Wellen's syndrome

Abstract Wellen's syndrome, a STEMI equivalent, is associated with severe stenosis of the proximal left anterior descending (LAD) in a patient with chest pain who needs emergency coronary angiography with the possibility of intervention. Due to only T wave changes in the electrocardiograph (ECG), Wellen's syndrome was easily ignored. Moreover, it may progress to acute myocardial infarction or even cardiac arrest. Therefore, clinicians should improve their understanding of this ECG pattern and appropriately dilate the coronary angiography indication. In addition, more dangerous narrowing of a coronary artery, as in our case, the left main artery stenosis, should also be considered.