Cerebral infarction is a cerebrovascular disease. Cerebrovascular diseases refer to the disorders of brain function caused by cerebrovascular lesions. Internationally, cerebrovascular diseases are roughly divided into eleven categories, including: i. transient ischemic attack; ii. stroke; iii. vertebrobasilar artery insufficiency; iv. cerebrovascular dementia; v. hypertensive encephalopathy; vi. intracranial aneurysm; vii. intracranial vascular malformation; viii. cerebral arteritis; ix. other arterial diseases; x. intracranial venous disease, venous sinus and cerebral venous thrombosis; xi. extracranial segment arteriovenous Diseases. Cerebral infarction belongs to stroke, also known as ischemic stroke, which is a disease that causes a series of neurological deficits due to ischemic necrosis and softening of restricted brain tissue caused by impaired blood circulation, ischemia and hypoxia in the brain. Cerebral infarction can be divided into five major categories according to its etiology: 1. large artery atherosclerosis type; 2. cardiogenic embolism type; 3. small artery occlusion type; 4. other definite causes; 5. unknown causes.