Define the acronym "CAB" in the context of CPR.

In the context of CPR, the acronym "CAB" stands for Circulation, Airway, and Breathing. This sequence emphasizes the importance of establishing effective circulation first when performing CPR, particularly in adult victims of cardiac arrest.

The rationale behind this approach is that high-quality chest compressions are crucial for maintaining blood flow to vital organs when the heart is not pumping effectively. After ensuring compressions are being delivered, the next priority is to open the airway to facilitate breathing or provide rescue breaths if needed. Finally, breathing is addressed to ensure that adequate oxygen is being delivered into the victim's lungs.

This sequence is a key aspect of CPR guidelines, emphasizing the critical nature of circulation in emergency response before attending to airway and breathing needs.