How does performing CPR on a drowning victim differ from performing it on a person with sudden cardiac arrest?

The correct choice highlights the key difference in the approach to CPR based on the underlying cause of the respiratory emergency. In the case of drowning, the primary issue is typically related to airway obstruction due to water in the lungs, which necessitates following the Airway-Breathing-Circulation (ABC) sequence. This means that rescuers focus first on ensuring the airway is clear and then provide rescue breaths before performing chest compressions, which is crucial because drowning victims often require immediate ventilation to address the lack of oxygen.

In contrast, with sudden cardiac arrest, the situation emphasizes the need to restore circulation quickly, which is why the focus shifts to the Chest-Airway-Breathing (CAB) sequence. Here, immediate chest compressions take precedence to circulate blood and provide critical perfusion to vital organs, as the primary issue is the heart's inability to pump effectively.

This distinction reflects the different priorities and needs of the victim in each scenario. Coaching the rescuer on the correct sequence can significantly impact the likelihood of a positive outcome for the victim, reinforcing the importance of adjusting CPR techniques according to the specific circumstances.