Defibrillation is the process of terminating ventricular fibrillation using medical devices or specific drugs, and can be classified as electrical defibrillation, pharmacological defibrillation, or manual defibrillation, depending on the method. Some studies have shown that the vast majority of cardiac arrests are due to ventricular fibrillation, 75% occur outside the hospital, 20% have no aura, and for every 1min delay in defibrillation, the likelihood of successful resuscitation decreases by 7%-10%.1. Electrical defibrillation: Electrical defibrillation refers to the use of rated, brief, high-energy pulsed current through the heart during severe rapid ventricular arrhythmias, causing all or most of the cardiac myocytes to be simultaneously It is a type of cardiac electrical resuscitation technique, also known as asynchronous cardiac electrical resuscitation, and can be divided into intrathoracic and extrathoracic defibrillation. Its indications include atrial fibrillation, atrial flutter in patients with ineffective drug therapy, ventricular fibrillation or ventricular flutter, ventricular tachycardia, paroxysmal The indications include atrial fibrillation, atrial flutter, ventricular fibrillation or ventricular flutter, ventricular tachycardia, and paroxysmal supraventricular tachycardia.2. Pharmacological defibrillation: This is done by injecting drugs to affect the electrical activity of the heart, and the drugs used clinically include lidocaine, bromelain, and amiodarone.3. Manipulative defibrillation: This is precordial percussion, but this method has limited recommendation in the current situation where defibrillation equipment is more popular. Therefore, extracorporeal automatic defibrillators can improve the success rate of defibrillation and survival rate of patients, reduce complications, and have significant clinical application effects and application advantages.