Sudden death is usually caused by a heart attack, severe ischemia of the heart, etc., which causes the patient’s heart to stop beating, or ventricular fibrillation to occur. Once sudden death occurs, it usually leads to death if the patient is not treated effectively. Therefore, once a person is found or encountered with sudden death, immediate treatment should be carried out in order to improve the success rate of treatment, if there is a delay of one minute, the success rate of treatment will be reduced exponentially. What should you do if you encounter a sudden death patient in your life? First, first judgment in the shortest possible time. One is to determine the consciousness, you can shout the patient or pat the patient’s shoulder and other methods to observe the response, if there is no response, indicating loss of consciousness; the second is to determine the respiratory and heartbeat: you can use the ear close to the patient’s mouth and nose, feel the respiratory breath, and at the same time to observe the chest whether there is a undulation of the action, if there is no indication of respiratory arrest. Not professionals to determine the heartbeat is more difficult to master the above two points for ordinary people have been enough. (Judgement of heartbeat is generally touch the carotid artery pulsation). Second, if you judge the occurrence of sudden death, you should immediately shout for help, immediately let others call the emergency telephone 120 or 999. Third, immediately put the patient flat, the history of the head fully tilted back to open the airway. Fourth, most of the sudden death patients are caused by ventricular fibrillation, so the use of the fist from the height of about 20~30cm to hammer the patient’s chest in the middle of the area, can produce a certain amount of energy, to play the effect of electric defibrillation. Hammering can be repeated 2~3 times, and then immediately press the middle and lower 1/3 of the patient’s sternum, about 100 times per minute, there should be a certain pressure amplitude, otherwise it is ineffective pressure, the pressure amplitude is about 3~5cm is more appropriate. Through the above 4 steps, part of the patient may be because of your rescue will come back to life. Of course, the most effective way is to send to the hospital as soon as possible in the shortest possible time, for effective rescue treatment.