What is the function of an Automated External Defibrillator (AED)?

The function of an Automated External Defibrillator (AED) is specifically to deliver an electric shock to the heart in order to restore a normal heart rhythm. When a person experiences certain types of cardiac arrest, such as ventricular fibrillation or pulseless ventricular tachycardia, the heart is unable to effectively pump blood. The AED analyzes the heart's rhythm and, if necessary, prompts the user to deliver a shock. This shock can help to reset the heart's electrical activity, allowing it to re-establish an effective rhythm.

While the other options involve important aspects of emergency response, they do not capture the primary purpose of the AED. Administering CPR is crucial for providing circulation during cardiac arrest and monitoring heart rates is a part of assessing a patient's condition, but these actions do not define the AED's core function. Similarly, while providing voice prompts can assist users in utilizing the device, the primary role of an AED remains its ability to deliver defibrillation shocks to save lives.