患者男,57岁,因“头晕20天,加重伴言语不利10 h”入院。高血压病史10余年;2012年12月因牙疼,自行口服甲硝唑(0.6 g/次,3次/d)治疗至今。20天前自感头晕,健忘,反应迟钝,今感头晕加重,走路不稳,晃动感,并出现视物旋转、恶心、呕吐、言语不利,并伴有右手麻木,双手不能准确取物。神经系统体检:意识清楚,言语不利,双瞳孔等大正圆 Male patient, 57 years old, because of “dizziness 20 days, aggravating the objection 10 h ” admission. Hypertension history of more than 10 years; December 2012 due to toothache, self-administered metronidazole (0.6 g / time, 3 times / d) treatment so far. 20 days ago felt dizzy, forgetful, unresponsive, this sense of dizziness aggravating, walking unsteady, swaying, and the visual rotation, nausea, vomiting, speech negative, accompanied by numbness of the right hand, his hands can not accurately extract. Nervous system physical examination: Consciousness, speech unfavorable, double pupil Dazhengyuan