What is the primary device used to restore a normal heart rhythm following a cardiac arrest?

The primary device used to restore a normal heart rhythm following a cardiac arrest is the automated external defibrillator (AED). AEDs are designed specifically for this purpose and are critical in the chain of survival for cardiac arrest victims. They analyze the heart's rhythm and deliver an electric shock when necessary to restore an effective heartbeat. This intervention is essential because it can drastically improve the chances of survival by addressing the immediate life-threatening rhythm disturbances associated with cardiac arrest.

While early defibrillation is an important concept, identifying the specific device involved in this intervention is key. AEDs are portable, easy to use, and can be operated by a layperson after minimal training, which makes them invaluable in emergency situations. Other options, such as CPR equipment and emergency medications, play supportive roles in the management of a cardiac arrest but do not directly restore the heart’s rhythm in the same manner as an AED does.