1. Normal varient most commonly seen in young males.
2. The early repolariztion (relaxation) of some myocardial fibers may deviate the ST upwards in a concave pattern, especially when R waves high with tall peaked T waves.
3. The J point is frequently elevated (where the QRS joins the concave ST elevation).
» A ST/T ratio in V6 of 0.25 will allow good separation of the two entities.
» ST segment elevation is typically less pronounced (equal to or less than 0.05mV) and the ventricular surface area is greater (more leads involved)