American Red Cross R.24 Lifeguarding Practice Exam 2025 - Free Lifeguarding Practice Questions and Study Guide

In the context of the adult cardiac chain of survival, early defibrillation with an Automated External Defibrillator (AED) is a critical responsibility of a lifeguard. This step is vital in the chain of survival because when a person experiences a cardiac arrest, the heart may be in a chaotic rhythm that can often be corrected with an electrical shock from an AED. Responding quickly to use an AED can significantly increase the chances of survival after cardiac arrest.

Utilizing an AED early maximizes the effectiveness of defibrillation, as the likelihood of restoring a normal heart rhythm diminishes over time without intervention. Lifeguards are trained to recognize when such an emergency occurs and to respond immediately with the use of the AED, which can be life-saving.

It's also important to note that while other actions, such as calling for help, performing rescue breaths, and administering chest compressions, are essential components of the chain of survival, they do not directly involve the immediate use of an AED. Each step in the chain plays a role in improving outcomes, but early defibrillation stands out for its critical impact in the event of a cardiac emergency.