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Automatic External Defibrillators (or AEDs) are life-saving medical devices that can detect
certain abnormalities in the way a person’s heart is beating, and deliver electrical shocks
to the heart to restore a normal heart beat. These devices are used in emergencies by physicians,
nurses and emergency responders on patients who have collapsed due to sudden cardiac arrest.
Sometimes they can even used by bystanders. At FDA, electrophysiologists, software engineers
and other scientists help ensure that AEDs are safe and effective.