what is pulseless electrical activity
From Wikipedia, the free encyclopedia. Pulseless electrical activity or PEA (also known by the older term electromechanical dissociation) refers to a clinical diagnosis of cardiac arrest in which a heart rhythm is observed on the electrocardiogram that should be producing a pulse, but is not.he approach in treatment of PEA is to treat the underlying cause, if known (e.g. relieving a tension pneumothorax). Where an underlying cause for PEA cannot be determined and/or reversed, the treatment of pulseless electrical activity is similar to that for asystole.