1病例报告例1(先证者):患者女,64岁。因“头晕2年余,加重伴头痛2个月”于2012-07-28入郑州人民医院。患者2年余前无明显诱因出现头晕,与体位变化无明显关系,间断发作,无恶心、呕吐,无视物旋转,无言语不利和肢体活动障碍等,休息后症状可减轻或缓解,自认为血压升高所致,均未诊治。2个月前无明显诱因头晕加重,以头位突然改变时为著,伴头痛、双手麻木,无 Case report 1 (proband): Female patient, 64 years old. Because “dizzy more than 2 years, increased with headache 2 months ” in 2012-07-28 into the Zhengzhou People’s Hospital. Patients with no obvious cause of dizziness more than 2 years ago, no relationship with the position changes, intermittent attacks, no nausea, vomiting, ignoring the object rotation, verbal dysphoria and limb movement disorders, rest after the symptoms can be reduced or alleviated, consider themselves blood pressure Due to the increase, no diagnosis and treatment. 2 months ago, there was no obvious incentive to dizziness aggravating, with a sudden change of head position for, with headache, numbness in both hands, no