Transient cerebral ischemia can be determined by symptoms, hemorheology, cerebral angiography, and cranial CT. Transient cerebral ischemia, also known as transient ischemic attack, refers to transient neurological deficits caused by localized cerebral or retinal ischemia. 1. Symptoms: episodes of vertigo, hemiparesis, hemiplegia, hemiplegia, aphasia, transient vision loss, visual field defects, etc., lasting 5-10 minutes, usually not more than 1 hour, recurrent episodes. 2. Blood rheology: increased whole blood viscosity, plasma viscosity, hematocrit, platelet aggregation rate. 3. Cerebrovascular examination: such as digital subtraction angiography, transcranial Doppler, etc., the appearance of vascular stenosis, atherosclerotic changes. 4. Cranial CT/MRI examination: can observe intracranial ischemia, except hemorrhagic disease. Patients with transient cerebral ischemia cerebral ischemia should seek timely medical treatment and follow the doctor’s instructions for examination and treatment.