What is the main purpose of using an AED in a patient with cardiac arrest?

The main purpose of using an Automated External Defibrillator (AED) in a patient experiencing cardiac arrest is to restore a normal heart rhythm. Cardiac arrest often results from arrhythmias, such as ventricular fibrillation or pulseless ventricular tachycardia, where the heart is unable to effectively pump blood. An AED is designed to analyze the heart's rhythm and, if necessary, deliver an electrical shock to restore a coordinated heartbeat.

The application of an AED can increase the chances of survival significantly when used promptly and correctly. While monitoring heart rhythms is important in a clinical setting, AEDs primarily focus on providing a shock to reset the heart's electrical activity. An AED does not assist with breathing or provide emergency medications, making its primary role specifically focused on rhythm restoration through defibrillation.