What device should be activated in the event of a cardiac arrest incident?

In the event of a cardiac arrest incident, the immediate activation of Emergency Medical Services (EMS) is crucial for the patient's survival. This action ensures that professional medical help is on the way, which often involves advanced life support and further medical interventions that can only be provided by trained EMS personnel.

Upon recognizing a cardiac arrest, bystanders should call EMS as the first priority, allowing them to quickly dispatch ambulances and advanced care teams to the scene. This rapid response is essential because the chances of survival decrease significantly with every passing minute without appropriate medical care.

While other options like using a defibrillator can be part of the response after activating EMS, the initial call for emergency services sets the stage for comprehensive medical support. It is also important to have on-site medical personnel available, but they may not always be present, and a first aid kit, although useful for minor injuries, does not address the specific needs of a cardiac arrest situation. Therefore, activating EMS is the most vital step in managing a cardiac arrest emergency.