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What Are the Risks of Using an Automated External Defibrillator?
Automated external defibrillators (AEDs) are safe to use. There are no reports of AEDs harming bystanders or users. Also, there are no reports of AEDs delivering inappropriate shocks.
If someone is having sudden cardiac arrest, using an AED and giving CPR (cardiopulmonary resuscitation) can improve the person's chance of survival.
Clinical trials are research studies that explore whether a medical strategy, treatment, or device is safe and effective for humans.
The NHLBI updates Health Topics articles on a biennial cycle based on a thorough review of research findings and new literature. The articles also are updated as needed if important new research is published. The date on each Health Topics article reflects when the content was originally posted or last revised.
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