What is used by nonprofessionals in emergency situations when defibrillation is required?

Nonprofessionals typically use Automated External Defibrillators (AEDs) in emergency situations requiring defibrillation. AEDs are portable devices that analyze a person's heart rhythm and can deliver an electric shock if necessary to restore a normal heartbeat. They are designed to be user-friendly, providing step-by-step voice prompts to guide the user through the process. AEDs are commonly found in public places, making them accessible for emergencies.