In case of ventricular fibrillation, immediate asynchronous DC defibrillation with a monophasic defibrillation energy of 360 joules is required. After defibrillation, the rhythm is checked and if sinus rhythm is not restored, immediate CPR cardiopulmonary resuscitation is performed for 2 minutes, intravenous access is established, and if there is no regression, asynchronous DC defibrillation is performed again and epinephrine is given every 3-5 minutes. For difficult to control ventricular fibrillation, amiodarone or lidocaine can be applied, and the establishment of an advanced airway, etc., can be considered, along with correction of reversible etiology and post-resuscitation management if sinus rhythm is restored. The principle of electrical defibrillation is to reorganize the rhythm of the myocardial conduction system through electrical discharge so that the heart can contract regularly, thus allowing an effective supply of blood to the surrounding organs and ensuring the blood and oxygen supply to the tissues. Any case of ventricular fibrillation requires immediate defibrillation, when the heart does not have regular contraction, the ejection of blood will be lost, the heart cannot eject blood, then the peripheral tissues of the body can not get enough blood supply, the physiological function of the tissues is difficult to guarantee, it will lead to damage of tissue cells, or even necrosis, resulting in organ failure. Especially, for example, brain cells are very sensitive to ischemia and hypoxia, and with insufficient blood supply, necrosis quickly occurs and brain death occurs, which is life-threatening.