Dizziness, weakness, and dyspnea are mainly seen in patients with acute cerebellar or brainstem infarction, and the main clinical manifestations are dizziness and weakness of the limbs, accompanied by nausea and vomiting. At the same time, if compressed, the patient will have difficulty breathing and have a change in respiratory rhythm. Some patients exhibit rapid or shallow breathing, while others exhibit deep and slow breathing. If the dizziness, weakness and dyspnea are caused by medullary infarction, ventilator-assisted breathing should be given early. 2. Ask the patient if he has a history of heart disease, some patients with acute myocardial infarction, the main manifestation is dizziness, weakness and dyspnea, then electrocardiogram and myocardial enzymatic examination should be done to clarify.