PEA can be classified as cardiac and  non cardiac depending on the initial underlying etiology.  Cardiac PEA can be further classified as primary and secondary to a preceding ventricular tachycardia or ventricular fibrillation.<unk>  electrical<unk>  can be classified either by the intensity of cardiac contractions or their electrical manifestations (true or psuedo PEA). There can be found different electrocardiographic patterns in each of the electrical manifestations<unk> .  There is also one type of<unk>  electrical<unk>  seen in a post- shock EKG, which should not be classified, and therefore approached as a true PEA.
Pulseless electrical activity classification
Bradycardia classification
QRS axis and voltage
Brugada syndrome classification
Tremor classification
Pulseless electrical activity epidemiology and demographics
Heat stroke classification
Syncope classification