What is the main function of an Automated External Defibrillator (AED)?

The primary function of an Automated External Defibrillator (AED) is to analyze the heart's rhythm and deliver an electric shock if necessary. When someone experiences a sudden cardiac arrest, their heart may go into a rhythm that is not effective for pumping blood, often referred to as ventricular fibrillation or pulseless ventricular tachycardia. The AED is designed to detect these life-threatening arrhythmias through its monitoring capabilities. If the AED determines that a shockable rhythm is present, it can deliver a controlled electric shock, known as defibrillation, which aims to restore a normal heart rhythm and improve the chances of survival.

This function is crucial because timely defibrillation can significantly increase a person's chances of survival when cardiac arrest occurs. The AED's simplicity and ability to provide clear voice prompts empower bystanders to assist in emergency situations, making it an essential tool in first aid and emergency response. Other options, such as providing oxygen, monitoring vital signs, or administering medication, do not represent the core function of an AED, which is focused on restoring heart rhythm through electrical intervention.