Objective To probe the variation of QT interval dispersion(QTd) and P-wave dispersion(Pd) in supine and erect position for children with vasovagal syncope(VVS).

• 目的探讨血管迷走性晕厥(VVS)儿童卧、立位QT间期离散度(QTd)及P波离散度(Pd)的变化。 方法直立倾斜试验(HUTT)阳性的VVS患儿46例为研究组。