If the infarct is small, it can be cured with active and correct treatment. If the infarct is large, the signs and symptoms are usually more severe, and the mortality and disability rates are higher. The brainstem is the life center of the human body, including the pons, medulla oblongata, and midbrain, and even small infarcts may present with clinically severe symptoms and signs. Patients may experience sudden onset of dizziness, nausea, vomiting, and balance disturbances, as well as dysphagia and choking on drinking water. Some patients can present with nystagmus and diplopia, and in severe cases, bulbar palsy and quadriplegia, as well as urinary and fecal disturbances, including urinary and fecal storage and urinary and fecal incontinence, and may even present with disturbances of consciousness, including lethargy, somnolence, and coma, and may also present with decorticate states. Patients may experience unstable vital signs, including unstable respiration, blood pressure and heart rate, and may also experience decreased oxygen saturation. If the onset of the disease should be given timely and correct treatment, ultra-early suitable for thrombolysis, as far as possible to give intravenous treatment, thrombolysis can rapidly restore cerebral blood flow, improve the metabolism of brain tissue, able to save the ischemic hemidiaphragm tissues that have only functional changes, and maximize the improvement of neurological deficits symptoms and signs, which may reduce the lethality and disability of the patient.