Final answer:
An AED is a device used to restore normal heart rhythm during a cardiac arrest and can be used by both medical professionals and the general public following simple instructions.
Step-by-step explanation:
The correct statement regarding the automated external defibrillator (AED) is that AED is used to restore normal heart rhythm in cases of cardiac arrest. AEDs are portable electronic devices that deliver a large charge in a short burst to correct abnormal heart rhythms like ventricular fibrillation. Contrary to some beliefs, AEDs are designed to be used by both medical professionals and laypersons and can be operated following simple verbal instructions. AEDs are effective in treating cardiac emergencies, particularly ventricular fibrillation, which is a life-threatening arrhythmia that requires immediate attention. They are found in ambulances and many public places, and are not restricted to indoor use only. It is also worthwhile to note that CPR (cardiopulmonary resuscitation) is often recommended before using an AED to provide the best chance of survival in cases of cardiac arrest.