When you pursue an emergency life support course, you'll learn about an important concept: the chain of survival. In 1991, the American Heart Association (AHA) introduced the chain of survival as an important sequence of events that improve a patient's chances of surviving a cardiac arrest. Knowing more about the four links will help you refine your first aid techniques.
1: Early access to an emergency response system
When someone suffers from a cardiac arrest, they need to access an emergency response system swiftly.