Answer:
AED stands for Automated External Defibrillator. AEDs are used when the heart rate increases to an extent where very less blood are pumped to the body. AEDs are the devices that are put on the chest region to bring back the heart rate to normal.
AEDs are powered by batteries that provides current to control the contraction and relaxation of heart muscle. Victims upto the age of eight are given AEDs with smaller pads as they require less energy for the same dose of defibrillation.