医生对反复发作性晕厥患者的处理甚感困难,约有50%患者的病因不能诊断。为查明复发性晕厥的病因,作者对这些患者进行头部倾斜试验。病人和方法试验采用 Shaw 倾斜台,将受试者头部倾斜60°达45min 或直至出现晕厥或心动过缓为止。试验期间每隔5min 测血压1次,如果出现晕厥先兆症状、心动过缓或低血压则每分钟测量血压。心率用心电图监护,一旦出现晕厥,立即将头部放平。结果经临床及心电图常规检查原因不明的复发性晕厥患者71例接受试验,53例(74%,男性26例, Doctors are very difficult to deal with patients with recurrent syncope, about 50% of the patients can not diagnose the cause. To ascertain the etiology of recurrent syncope, the authors performed a head tilt test on these patients. Patient and method trials were performed using a Shaw tilt table with the subject’s head tilted 60 ° for 45 min or until syncope or bradycardia occurred. Blood pressure was measured every 5 minutes during the test, and if there was a presyncope, bradycardia or hypotension was measured every minute. Heart rate with ECG monitoring, in the event of syncope, immediately flat his head. Results 71 patients with unexplained recurrent syncope were tested by clinical and electrocardiogram routine examination, 53 (74%, 26 males,