Generally there is no exact value for how long one can live after checking out posterior circulation ischemia, it may be related to the severity of ischemia and the treatment. Posterior circulation ischemia refers to transient ischemic attacks of the carotid artery system, in which the patient will appear pale, thin, and lack of physical strength. In addition, if strenuous exercise is performed, the blood supply to the brain may be insufficient, which may lead to respiratory difficulties, dizziness and other problems. Generally speaking, if the posterior circulation ischemia is not serious and effective treatment is taken in time, life expectancy is usually not affected. If the condition is more severe but treated promptly, the patient’s life expectancy is unlikely to be affected. However, if the patient has been ischemic for a long period of time and is not treated in time, and a large posterior circulation infarction occurs, then the survival period will be shorter, and life will be in danger at any time. Therefore, once the posterior circulation ischemia is detected, then it is necessary to receive treatment as soon as possible, choose the appropriate treatment plan under the guidance of the doctor, and also actively control the blood pressure, so as to prolong the life.