The waveform of ventricular fibrillation is characterized by the complete disappearance of the QRS wave cluster and the T-wave, which is replaced by flutter waves of varying shape and size and irregular frequency. The frequency of the flutter wave is 250-500 times/min. Ventricular fibrillation is a malignant arrhythmia, which can be clearly diagnosed by electrocardiogram and is one of the causes of sudden death. The clinical manifestations of ventricular fibrillation are sudden loss of consciousness, convulsions, bruising, loss of aortic pulsations, undetectable blood pressure, and soon respiratory and cardiac arrest. When ventricular fibrillation is detected, it is necessary to fight for time to rescue, the success rate of rescue within 4 minutes of the onset of the disease is more than 50%, and the success rate of rescue after 4 minutes drops to 4%, for ventricular fibrillation patients, time is life. Rescue ventricular fibrillation preferred defibrillator shock defibrillation, no defibrillator can first in the anterior region of the heart to hammer two or three times, and then give cardiac compression.