Which of these actions should be taken first in a suspected cardiac arrest?

In the event of a suspected cardiac arrest, initiating cardiopulmonary resuscitation (CPR) immediately is crucial. The primary goal during a cardiac arrest situation is to maintain blood flow to vital organs, particularly the brain and heart, until more advanced medical care can be provided. Starting CPR helps to circulate oxygen-rich blood to the body, which can significantly increase the chances of survival.

Timing is critical; every moment without effective CPR decreases the likelihood of a positive outcome. Thus, beginning chest compressions as soon as possible—even before calling for backup or applying an Automated External Defibrillator (AED)—is imperative. While using an AED and calling for assistance are vital steps that follow, immediate CPR is the foundation of resuscitation efforts. Immediate action can make a life-saving difference, and this is why starting CPR is the correct first action in such a scenario.