一、临床资料患者男性 ,30岁 ,轰炸机飞行员 ,飞行时间 10 0 0 h。因发作性头晕、视物模糊 9年 ,加重 1个月入院。患者近 9年来在飞行强度较大时出现发作性头晕、视物模糊及看不清仪表 ,每次持续数秒。入院时查体 :一般状况好 ,神经系统检查无阳性体征。经颅多普勒提示 :右侧大 First, the clinical data of patients male, 30 years old, bomber pilot, flight time 10 0 h. Due to episodes of dizziness, blurred vision 9 years, increased 1 month admission. The patient has had episodes of dizziness, blurred vision and inability to see the instrument for a few seconds during each of the past nine years with greater intensity of the flight. Physical examination on admission: the general condition is good, nervous system examination no positive signs. Transcranial Doppler Tip: Right large