AED stands for Automated External Defibrillator
An AED is a device that automatically analyzes heart rhythms and advises the operator to deliver a shock if the heart is in a fatal heart rhythm. AEDs are safe and will not shock anyone who is not in a fatal heart rhythm. Non-medical personnel can use AEDs safely and effectively with minimal training. A computer inside the defibrillator analyzes the victim's heart rhythm. The device decides whether a shock is needed. Some devices shock the victim automatically if a shock is advised.and others require the operator to press a button to deliver the shock. In both types of AEDs the shock is deliverd through pads stuck to the victim's bare chest. It stuns the heart, stopping the abnomral heart activity, and allowing a normal heart rhythm to resume.