The most important treatment of pulseless electrical activity (PEA) is:

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The most important treatment for PEA is to assess for and treat the underlying cause. Common causes include hypovolemia, hypoxia, acidosis, electrolyte imbalances, cardiac tamponade, tension pneumothorax, pulmonary embolism, and overdose/toxicity. Defibrillation and transcutaneous pacing are not indicated for PEA, and carotid massage is only indicated for certain types of bradyarrhythmias.

The Most Important Treatment of Pulseless Electrical Activity (PEA) Is