Diagnosis
The absence of a pulse confirms cardiac arrest, but PEA can only be distinguished from other causes of cardiac arrest with a device capable of electrocardiography (ECG/EKG). In PEA, there is electrical activity in the heart (as opposed to asystole), but not compatible with either ventricular fibrillation or ventricular tachycardia.
Read more about this topic: Pulseless Electrical Activity