Patients with an acutely occluded or obstructive culprit coronary artery (acute coronary occlusion myocardial infarction, abbreviated as ‘OMI’), who will benefit from emergent reperfusion therapy, are currently identified on the basis of electrocardiographic ST-segment elevation [ST-elevation myocardial infarction (STEMI)].1,2 However, the pathophysiology of acute coronary syndrome (ACS) due to thrombotic occlusive coronary stenosis is often dynamic and may impact electrocardiogram (ECG)...