What is an automated external defibrillator?
An automated external defibrillator (AED) is a small portable electronic device that analyzes the heart's rhythm and tells the user to deliver a defibrillation shock only if it is needed.
Unlike defibrillators used by health care professionals, AEDs are designed to allow trained non-professionals to respond to medical emergencies like sudden cardiac arrest. The devices are programmed to analyze the heart's electrical function. Voice prompts and screen displays explain how to attach electrodes onto the victim, then instruct users to stay clear while the AED analyzes his or her heart rhythm. See AED/CPR Training.