Answer:
It eliminates the abnormal heart rate.
Step-by-step explanation:
The Chain of Survival should be applied when a patient is under cardiac arrest.
Cardiac arrest is mostly caused due to abnormal electrical activity in the victim's heart. This can result in ventricular fibrillation or pulseless ventricular tachycardia which, if not treated, could cause death.
An automated external defibrillator (AED) is designed to restore the heart's regular activity, by providing a heavy electric shock to the patient's chest. This a vital step in the chain of survival as it greatly increases the chances of survival.