Correct Response: C. Automated external defibrillators (AEDs) are portable devices that can be used when a person has a heart attack. The AED checks the victim's heart rhythm and can deliver an electric shock to restart the heart if needed. To prevent others from being shocked, it is important that no one else is in contact with the victim when the AED is in use. Securing a person's arms (A) is not necessary when using an AED; it is more important to get the victim's heart restarted quickly without injuring others in the process. Although calling 911 should be done immediately in this situation, it is not necessary to confirm that an ambulance is on its way (B) before using the AED. A person can die within minutes of having a heart attack, so getting the heart restarted and oxygen to the brain should be a priority. Ensuring an adequate tilt to the victim's head (D) is an important step in CPR but is not necessary when using an AED.
