Objective To explore the relationship between unexplained chest distress and(or)chest pain in children and head-up tilt test(HUTT).
目的探讨儿童不明原因胸闷和（或）胸痛与直立倾斜试验（HUTT）的关系。
Objective: to study head-up tilt test (HUT) in the diagnosis of vasovagal syncope (VS) and to evaluate therapeutic effect of metoprolol treating VS.
目的：研究直立倾斜试验(HUT)诊断血管迷走性晕厥(VS)，观察美托洛尔治疗VS的疗效。
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。
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。
Objective To study the characteristics and clinical features of positive response during head - up tilt test (HUT) in children.
目的探讨儿童直立倾斜试验(HUT)阳性反应特点及临床特征。
Objective To study the characteristics and clinical features of positive response during head - up tilt test (HUT) in children.
目的探讨儿童直立倾斜试验(HUT)阳性反应特点及临床特征。
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