Cerebrovascular diseases are usually divided into two categories according to their nature: ischemic cerebrovascular diseases and hemorrhagic cerebrovascular diseases. Ischemic cerebrovascular disease (1) Transient ischemic attack (TIA, also known as mini-stroke or transient ischemic attack), the cause of which is related to cerebral atherosclerosis, is a functional disorder caused by transient, ischemic and focal damage to brain tissue. (2) Cerebral thrombosis, mostly caused by atherosclerosis, various arteritis, trauma and other physical factors, blood disorders caused by local lesions in the cerebral vessels and the formation of blood clots. (3) Cerebral embolism, which can be induced by emboli produced by various diseases entering the bloodstream and blocking the blood vessels in the brain. Clinically, heart disease is the most common cause; followed by fracture, or fat into the blood after trauma; worm eggs or bacterial infection; air into the blood such as pneumothorax, embolism formed by phlebitis and other factors, embolism caused by the cerebral blood vessels. Treatment 1.Medical treatment; 2.Surgical/interventional prevention.