Sudden cardiac death is defined as death within one hour of the onset of an acute illness and is caused by cardiac causes. There are many causes, most patients have organic heart disease, such as coronary heart disease, myocarditis and other heart diseases. Sudden cardiac death can also be caused by drug intoxication. Most sudden cardiac deaths are caused by cardiac arrhythmias, such as electrical instability and myocardial ischemia. Methods of preventing sudden cardiac death 1, pay attention to warmth in winter, dress appropriately and lightweight, cold-proof and warm clothing, breathable, and try to avoid field activities. 2, usually keep in a happy mood, comfortable, be generous, do not for some trivial griping, fighting with others, affecting their own health, more to maintain emotional stability. 3, a reasonable diet, usually eat more fresh vegetables and fruits, eat less food with high fat content, fish and meat is not desirable, eat more light food on the human body is good, do not put too much salt to eat, do not smoke and drink less alcohol, eat only eight minutes full, do not eat too much. 4, there are some tips for daily life, such as to do “three and a half minutes” and “three and a half hours”, three and a half minutes refers to the night before going to bed to lie down for half a minute, get up in the morning and sit for half a minute, get out of bed before the two legs down for half a minute, three and a half hours refers to. Walking half an hour after getting up in the morning, sleeping half an hour at noon, and walking half an hour in the evening after dinner, we should maintain a moderate amount of physical exercise in normal times, and pay more attention to the combination of work and rest. Beneficial to the body and mind. 5, to maintain a smooth bowel movement, every day to maintain a regular bowel movement is a good way to detoxify the human body, bowel movement does not force defecation will increase the pressure in the stomach, easy to cause an acute attack of coronary heart disease and lead to palpitations, the occurrence of sudden cardiac death. 6, the treatment of basic diseases should not be delayed, adhere to the use of medication, maintain stable blood pressure, blood sugar, blood lipids are within a stable range, to reduce the occurrence of some complications. Sudden cardiogenic death refers to the death of acute symptoms after the onset of the attack, mostly caused by heart disease, this disease is fast-onset and harmful. In normal times must pay attention. Sudden cardiac death is generally manifested as patients will appear some such as chest tightness, shortness of breath, fatigue and other phenomena, but some patients are asymptomatic. In the usual prevention, regular medical examination is very necessary, but also to avoid excessive exertion and mental stress, relax, quit smoking and drinking, will prevent the occurrence of the disease.