Mostly seen in healthy patients <50, less likely >50, unlikely >70
Typical patient is male, black, athlete
Shows diffuse ST elevation similar to pericarditis and STEMI
Underlying pathophysiology poorly understood, however, it is normally a benign process
Early repolarization
Cardiac
Wide QRS
ST-segment elevation myocardial infarction 
T wave changes
Post-MI 
ST segment depression
Previous MI with recurrent ischemia in same area