Sudden death is usually due to heart disease, severe ischemia of the heart, etc., causing the patient’s heart to stop beating, or ventricular fibrillation to occur. Once sudden death occurs, if the patient is not effectively treated, it usually leads to death. Therefore, once someone is found or encountered sudden death, it should be treated immediately in order to improve the success rate of treatment, if delayed by one minute, the success rate of treatment will be reduced exponentially. If you encounter a sudden death patient in your life, what should you do? First, the first judgment in the shortest possible time. First, to determine consciousness, you can shout at the patient or pat the patient’s shoulders and other methods to observe the response, if there is no response, indicating loss of consciousness; second, to determine the breathing and heartbeat: you can use the ear close to the patient’s mouth and nose, feel the breathing breath, while observing whether there is an undulating movement of the chest, if not, it means that breathing has stopped. Not professionals to determine the heartbeat is difficult, master the above two points for the general public is sufficient. (To determine the heartbeat is usually to touch the carotid artery to see if there is a pulsation). Second, if sudden death is judged to have occurred, you should immediately shout for help, and immediately let others call the emergency number 120 or 999. Third, immediately lay the patient down, and the patient’s head is fully tilted back to open the airway. Fourth, most patients with sudden death are caused by ventricular fibrillation, so using a fist to hammer the patient’s chest from a height of about 20~30cm can generate some energy to play the effect of electric defibrillation. The hammering can be repeated 2~3 times, and then immediately press the patient’s middle and lower 1/3 of the sternum, about 100 times per minute, with certain pressing amplitude, otherwise it is ineffective pressing, and the pressing amplitude is about 3~5cm is more appropriate. Through the above 4 steps, a part of the patient may be brought back to life because of your resuscitation. Of course, the most effective way is to send to the hospital as soon as possible in the shortest possible time for effective resuscitation treatment.