Patients in cardiac arrest are usually caused by malignant arrhythmias such as ventricular fibrillation, and cardiac arrest caused by ventricular fibrillation requires electrical defibrillation treatment. The care after electric defibrillation: 1, fasting, continuous cardiac monitoring, close observation of the patient’s heart rate, respiration, blood pressure, facial color, mental status, etc., and give discretionary treatment according to the situation; 2, check whether the intravenous access and monitoring pipeline is smooth to ensure emergency medication, hemodynamic monitoring; 3, after defibrillation, it is necessary to pay attention to the local skin for burns, and strengthen the post-resuscitation care for cerebral edema, cardiac insufficiency and other complications. After defibrillation, continue to use amiodarone and other drugs to maintain sinus rhythm.