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An automatic external defibrillator (AED) is a medical tool that helps to save someone’s life who has suffered a sudden cardiac arrest (SCA). They work by scanning the heart to determine whether a shock is needed and if so, will deliver one. Working self sufficiently, they shock the patient automatically without you having to do anything once the electrode pads are in place.AED’s are installed in offices, doctors surgeries, sports facilities, factories, supermarkets, schools, local villages and …