Typically asymptomatic
Patients may have Vfib cardiac arrest or sudden death
Diagnostic ECG findings transient and variable, with only 1/3 of serial ECGs diagnostic in confirmed spontaneous coved-type<unk>  patients
Brugada syndrome
Cardiac
Vincent's angina
ST-segment elevation myocardial infarction 
Torsades de pointes
Post-MI 
Takotsubo cardiomyopathy
Previous MI with recurrent ischemia in same area