What is the first step in managing an adult with cardiac arrest?

The first step in managing an adult with cardiac arrest is calling for help and initiating high-quality CPR. This choice is correct because immediate recognition of cardiac arrest and beginning CPR is critical for survival. High-quality CPR helps maintain blood circulation to vital organs, particularly the brain and heart, which is essential during the critical early moments of cardiac arrest.

In this urgent situation, time is of the essence. By starting CPR right away, the chances of a successful resuscitation increase significantly. It is also important to ensure that help is on the way, as advanced medical interventions, such as defibrillation, are necessary for effective treatment of the underlying causes of the cardiac arrest.

Performing rescue breaths immediately or checking for a pulse for an extended period can delay the provision of CPR. Waiting to apply an AED until after CPR is initiated can also be detrimental since the AED can assist in the early defibrillation of the patient if it is available and used promptly. Thus, the initiation of high-quality CPR paired with seeking additional help takes priority in this critical scenario.