Ventricular fibrillation is a fatal arrhythmia and a major cause of sudden cardiac death. Electrical defibrillation is the main method of ventricular fibrillation resuscitation, but it is not always available in real-life situations, and ventricular fibrillation cannot be recognized by the naked eye alone. Therefore, in real life, patients with ventricular fibrillation often fall to the ground suddenly and suffer from sudden respiratory and cardiac arrest. First, call first aid after finding someone on the ground, you can first tap and call to see if the patient is still conscious, while moving the patient to a safe place, and call the emergency phone to call an ambulance. Second, cardiopulmonary resuscitation 1, touch the patient’s carotid artery whether there is pulsation, if not pulsation, indicating cardiac arrest, need to carry out cardiopulmonary resuscitation as soon as possible, let the patient face up, placed on a hard plane, unbutton the clothes, the middle of the sternum as the compression point, hands overlapping, vertical downward pressure, compression depth of at least 5cm, compression frequency of 100-120 times / min, compression ventilation ratio of 30:2. when compressions pay attention to Ensure that the arms are perpendicular to the sternum and that the chest wall is fully rebounded; 2. Artificial respiration requires a clear airway, the rescuer needs to pinch the patient’s nostrils to avoid air leakage, blowing for a duration of >1 second each time, and blowing for 2 consecutive times to ensure that the chest is heaving. After 5 consecutive cycles, call or check the pulse to assess the patient’s vital status. If there is no improvement, continue CPR. C. Electrical defibrillation 1. If an automated external defibrillator is available, the electrode pads can be applied to the appropriate area and operated by pressing the indicated button on the defibrillator. The defibrillator will automatically complete ECG analysis and decide automatically whether to discharge defibrillation according to the analysis results. After defibrillation, continue to perform chest cardiac compressions and repeat the above cycle; 2. If ventricular fibrillation is caused by heart failure, such as dilated cardiomyopathy, rheumatic heart valve disease, etc., it is possible to cause ventricular fibrillation when it is severe to a certain degree, in this case, the primary disease needs to be actively treated, and for ventricular fibrillation, lidocaine can be selected for treatment. If there is a serious electrolyte disorder, such as hyperkalemia, hypokalemia can lead to ventricular fibrillation, then it is necessary to correct the electrolyte disorder, electrolyte balance after ventricular fibrillation can be gradually alleviated.