aim to examine and compare influence and time dependence of head up tilt (hut) or standing (std) on decline of contraction responses of rat femoral artery caused by simulated weightlessness.
目的观察和比较头高位(hut)与站立位(std)对模拟失重所致股动脉收缩反应性降低的影响及其时间依赖性。
methods:to analyze the data of head up tilt test(hut) of 100 patients with symptoms of vasovagal syncope clinically and 21 normal controls with no history of syncope.
方法:分析100例临床表现为血管迷走性晕厥的患者和21名无晕厥史的正常人直立倾斜试验的结果。
head up tilt test plays a crucial role to direct diagnosis of vasovagal syncope, which has important value in clinical application.
直立倾斜试验对血管迷走性晕厥疾病的直接诊断起着决定性的作用,具有重要的临床应用价值。