<unk>  is defined as either a notch described as a positive deflection after a positive QRS segment or a J point elevation of more than 0.1 mV in at least two consecutive leads. While<unk>  has been long considered a normal benign ECG variant, some studies suggest an association between<unk>  and increased risk of arrhythmia, particularly ventricular fibrillation. Moreover,<unk>  pattern must be differentiated from<unk>  syndrome as the former is strictly an EKG finding whereas the latter represents a symptomatic situation of cardiac arrest or syncope following the occurrence of an<unk>  pattern.<unk>  can be confused with STEMI and pericarditis.
Early repolarization
Poor R Wave Progression
T wave inversion
U wave alternans
Low QRS voltage
Junctional rhythm
T wave alternans
Negative inotropy