A common underlying cause when PEA presents as the initial rhythm includes which of the following?

A common underlying cause when PEA presents as the initial rhythm includes which of the following?

• A. Hypoxia or acidosis
• B. Hypervolemia
• C. Tension pneumothorax with high preload
• D. Increased afterload

Answer: (A)

PEA means there’s organized electrical activity but no effective blood flow. The most frequent reversible triggers for this pattern are problems with oxygen delivery and metabolic balance. Hypoxia or acidosis directly depress heart muscle function and its responsiveness to CPR and medications, so addressing oxygenation and ventilation and correcting the metabolic milieu often restores perfusion. Hypervolemia and increased afterload aren’t as commonly the initial culprits in this scenario, and tension pneumothorax, while possible, is less common as the presenting underlying cause when focusing on the typical, readily reversible factors. So, the best choice reflects the most common reversible conditions driving PEA: insufficient oxygen or an acidotic state.

PEA means there’s organized electrical activity but no effective blood flow. The most frequent reversible triggers for this pattern are problems with oxygen delivery and metabolic balance. Hypoxia or acidosis directly depress heart muscle function and its responsiveness to CPR and medications, so addressing oxygenation and ventilation and correcting the metabolic milieu often restores perfusion. Hypervolemia and increased afterload aren’t as commonly the initial culprits in this scenario, and tension pneumothorax, while possible, is less common as the presenting underlying cause when focusing on the typical, readily reversible factors. So, the best choice reflects the most common reversible conditions driving PEA: insufficient oxygen or an acidotic state.