Self-rescuing defibrillators are automated external defibrillators also known as automated external defibrillators, or AEDs. AEDs are usually stored in public environments, such as airports, train stations, shopping malls, subway stations, and other crowded places, and are portable medical rescue devices that can diagnose specific cardiac arrhythmias and administer shock defibrillation therapy, and are medical devices that can be used by non-professionals to rescue patients with cardiac arrest. Defibrillation and cardiopulmonary resuscitation (CPR) using an automated external defibrillator (AED) is the most effective way to stop sudden death in cardiac arrest, but only during the “golden 4” minutes, which is the optimal time for resuscitation. Turn on the automated external defibrillator, attach the electrodes, analyze the heart rate, and give electric defibrillation according to the machine’s instructions, if necessary. Defibrillation should be operated in conjunction with external cardiopulmonary resuscitation (CPR) until the arrival of emergency personnel.