How long a brain failure patient survives depends on the severity of the patient’s condition and the strengths and weaknesses of the treatment program. Generally speaking, most patients are able to survive for about five years. Of course, this question is also related to the patient’s physical condition. If the patient is a young person, because his or her physical condition is better than that of the elderly or children, and his or her immunity is relatively high, he or she may survive for a longer period of time, which can be as long as more than 10 years. But compared to the immune system is relatively poor elderly is more dangerous, need to go to the hospital neurology department to do examination, and take the blood to promote the blood of drugs, serious may also need to use auxiliary equipment to carry out treatment, most of the patients’ life expectancy is not more than four or five years, so for the question of how long to live, and can not be generalized.