In the adult Out-of-Hospital chain of survival, which link is early activation of EMS?

The link referred to as "activation of Emergency Response" is critical in the adult Out-of-Hospital chain of survival because it initiates the process of bringing professional medical help to the scene as quickly as possible. Early activation of emergency medical services (EMS) ensures that advanced care and transport are on their way while bystanders or first responders begin immediate intervention, such as performing CPR. This step is vital in improving survival rates following cardiac arrest, as it reduces the time before the patient receives comprehensive medical attention and intervention that can significantly affect outcomes.

By activating emergency response promptly, individuals are effectively moving the patient closer to receiving high-quality advanced care, which is an essential element of the overall chain of survival. This link underscores the importance of recognizing a medical emergency and taking decisive action to summon help without delay, setting the stage for subsequent life-saving measures to be implemented swiftly.