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Defibrillators | National Heart, Lung, and Blood Institute ...
Automated external defibrillators (AEDs) and implantable and wearable cardioverter defibrillators (ICDs and WCDs) are devices that restore a normal heartbeat for people in sudden cardiac arrest. Learn about how they work, who needs them, how to use an AED, surgery for an ICD, and living with an ICD or WCD.
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