血管迷走性晕厥儿童心室晚电位变化

Changes of ventricular late potential in the children with vasovagal syncope

目的探讨血管迷走性晕厥(VVS)儿童心室晚电位(VLP)的变化。方法直立倾斜试验(HUTT)阳性的VVS儿童45例(研究组),用广东中山SR-1000A心电综合自动分析仪通过体表叠加方法检测VLP。匹配健康儿童45例(对照组)。结果与对照组比较,研究组高频低幅时限(LAS40)明显延长(P<0·05),心率、总QRS时间(TQRS)、均方根值(RMS40)差异无统计学意义(P>0·05)。结论VVS儿童心肌电活动异常,存在心脏事件发生的危险性。

Objective To explore the ventrieular late potential （VLP） in the children with vasovagal syncope （VVS）. Methods The VLP was analyzed in children （ n = 45 ） who had a positive head - up tilt table test （HUTT） result and the diagnosis of VVS. The VLP was reeorded by the method of superposition on body surface. Healthy children were matched as controls （ n = 45 ）. SPSS11.0 software was used for the statistical analysis of these data. Result LAS40 in study group was prolonged, eompared with control group （P 〈 0.05）. No statistical differences were found in HR, the total time of the QRS （TQRS） and root mean square value （ RMS40 ） between two groups （ P 〉 0.05 ） . Conclusion There are abnormal eleetrieal aetivities in myoeardium and the eardiae aeeidents in the ehildren with VVS.