Cerebral infarction

Cerebral infarction (CI) is a general term for ischemic stroke, including cerebral thrombosis, lacunar infarction, and cerebral embolism, etc., accounting for about 70% of all strokes. It is caused by cerebral blood supply disorders. Department of lesions. Cerebral infarction is due to the sudden reduction or cessation of local blood supply to the arterial blood flow in the brain tissue, causing ischemia and hypoxia of the brain tissue in the blood supply area of ​​the blood vessel to cause necrosis and softening of the brain tissue, accompanied by clinical symptoms and signs at the corresponding site, such as hemiplegia Symptoms of neurological deficits, such as aphasia. 24 to 48 hours after the onset of cerebral infarction, a low-density focus at the corresponding site can be seen on a CT scan of the brain. Cerebral infarction can be detected earlier in the brain MRI, which shows that T1 on the weighted image shows low signal in the lesion area and T2 shows high signal. MRI can find smaller infarct lesions.