Is a portable device that is used to revive a person experiencing sudden cardiac arrest. Here are some detailed functions of AED: 1. Voice prompts: AEDs are designed to provide clear and concise instructions through voice prompts to guide the rescuer step-by-step on how to operate the device. 2. Automated analysis: The AED has electrodes that are attached to the victim’s chest to detect the heart rhythm. The automated analysis feature then assesses the rhythm and determines whether a shock is necessary. 3. Shock delivery: If the AED determines that a shock is necessary, it delivers an electric shock to the heart to restore its normal rhythm.