<prompt> Which of the following is not a cause of PEA Pulseless Electrical Activity?Low pO2 60mm HgHydrogen ion depletionHypokalemiaHypovolemia  <response>: The 5 H and 5 T of pulseless electrical activity - PEA implies that electrical activity is seen on ECG but the pulse is absent. The leading cause of PEA is hypoxia secondary to respiratory failure 40-50 cases and hypovolemia. Hydrogen ion depletion implies alkalosis whereas PEA occurs with acidosis. H Hypovolemia Hypoxia Hydrogen Ion acidosis Hypo Hyperkalemia Hypothermia T Toxins Tamponade Tension Pneumothorax Thrombosis hea: acute, massive MI Thrombosis lungs: massive PEE 