How is circulation restored during CPR according to the ABCs?

During CPR, circulation is restored primarily through the act of performing compressions. Compressions generate blood flow by manually pumping the heart, which can help circulate oxygenated blood to vital organs when the heart is not functioning effectively. This action is essential because it creates pressure within the chest cavity, allowing blood to be pushed out of the heart and delivered to the rest of the body.

In the context of the ABCs of CPR—Airway, Breathing, and Circulation—compressions are a critical component for maintaining blood flow and preventing brain damage during a cardiac event. The emphasis on compressions over checking for a pulse reflects the urgency of initiating immediate action when someone is unresponsive and not breathing normally.

Other methods mentioned, such as checking for a pulse or providing adrenaline, do not directly restore circulation in an emergency situation. Checking for a pulse can take time and may delay necessary life-saving actions. Similarly, administering adrenaline is part of advanced life support and not part of the immediate response required in CPR. Tilting the head back is important for ensuring an open airway but does not relate to the restoration of circulation.