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

The main purpose of using an AED, or Automated External Defibrillator, is to deliver an electrical shock to restore a normal heart rhythm in cases of cardiac arrest. When a person experiences certain types of cardiac dysrhythmias, such as ventricular fibrillation or pulseless ventricular tachycardia, the heart is unable to pump blood effectively. The AED analyzes the heart rhythm and decides if a shock is needed. If so, it delivers a precisely timed electrical shock that can help reset the heart's rhythm, allowing it to re-establish a normal pattern.

This life-saving function emphasizes the importance of immediate action during cardiac emergencies, as delivering a shock through an AED can significantly increase the chances of survival when used promptly. The device is designed to be user-friendly, often providing voice prompts to guide responders through the process of positioning the pads and administering the shock.

In contrast, other options do not align with the primary function of the AED. Automatic CPR devices or techniques are not a function of the AED itself; monitoring heart rates is typically done with ECG monitors rather than AEDs; and providing oxygen is an important aspect of patient care but is not the primary function of an AED.