直立倾斜试验的时间对不明原因晕厥患者诊断结果影响分析

目的研究进行直立倾斜试验时不同时间对不明原因晕厥患者诊断结果的影响。方法对1290例不明原因晕厥患者进行基础倾斜试验及药物激发试验。其中一组基础时间为45min,药物试验时间为20min(A组),另一组基础时间为30min,药物为10min(B组),观察两组试验阳性率。结果 A组中血管迷走性晕厥336例(51.9%),直立性低血压94例(13.9%);B组中血管迷走性晕厥324例(50.4%),直立性低血压96例(14.9%),两组阳性率相似(51.9%与50.4%,P>0.05)。结论 2组不同时间直立倾斜试验方法对不明原因的晕厥患者诊断阳性率没有明显差异。

Effects of duration of upright tilt test on the diagnosis in patients with unexplained syncope

Objective To examine the effects of various duration of upright tilt test on the diagnosis in patients with unexplained syncope. Methods A total of 1290 patients with unexplained syncope underwent baseline upright tilt test and medication provocation test. A subgroup was tested for 45 minutes at baseline measurement and 20 minutes during provocation test （Group A）. Patients in group B were subjected to a 30-minute baseline and 10-minute provocation test. We next compared the positive rate of both groups. Results There were 336 eases （51.9%） with vasovagal syncope and 94 （13.9%） with orthostatic hypotension being diagnosed in Group A, and these figures were 324 cases （50.4%） and 96 cases （14.9%） in Group B, respectively. Both groups yielded similar positive rates （51.9% vs. 50.4%, P〉0.05）. Conclusion The diagnostic yield of upright tilt tests with various durations does not differ significantly in patients with unexplained syncope.