In most cases, cardiopulmonary arrest in infants and children is caused by:

• A. Respiratory arrest.
• B. A cardiac dysrhythmia.
• C. A drug overdose.
• D. Severe chest trauma.

Answer: (A)

In children, the pathway to cardiopulmonary arrest usually starts with a failure to breathe or a severe breathing problem. When a child’s airway or breathing is inadequate, oxygen levels fall quickly. The heart and brain are highly sensitive to this lack of oxygen, so the heart’s rhythm can slow and eventually stop as hypoxia worsens. That means arrest often follows respiratory arrest, not a primary heart problem. While a drug overdose, severe chest trauma, or a cardiac rhythm disturbance can cause arrest, they are less commonly the initial trigger in pediatric cases. So focusing on maintaining airway and ventilation is critical because preventing or correcting respiratory failure prevents progression to full cardiac arrest.