How many years can one live with vertebral basilar artery insufficiency? It needs to be judged according to the severity of the symptoms. Mild cases are recurrent neurological deficits, which do not have much impact on life expectancy, while severe cases can involve the brainstem and jeopardize the life of the patient. The vertebrobasilar system refers to the main trunk of the vertebral artery, the main trunk of the basilar artery, and its branches. Insufficient blood supply refers to the recurrent dysfunction of the brainstem, cerebellum, and occipital lobe due to ischemia caused by stenosis or occlusion of blood vessels. Mild symptoms of vertebrobasilar insufficiency are dizziness, balance disorders, abnormal eye movements and diplopia, numbness and paralysis of the face or limbs, usually due to stenosis or tiny emboli. If the blood vessel is severely narrowed or completely occluded, cerebral infarction can occur, resulting in paralysis of limbs, impaired consciousness, etc., and even life-threatening. When insufficient blood supply to the vertebrobasilar artery causes dizziness, limb movement or sensory impairment, it is important to consult a doctor in a timely manner and receive treatment under the guidance of a specialist to slow down life expectancy, so as to avoid serious life-threatening consequences.