【摘要】 应用心内电生理检查７８例室上性心动过速（ＳＶＴ）患儿，以探讨ＳＶＴ在小儿的发生机制和定位，并与成人相比较；同时对其中７５例进行了射频消蚀治疗。结果显示房室折返５９例（７６％），房室结折返１６例（２０％），自律性房性心动过速１例（１％），心房扑动２例（３％）。５９例房室折返中，显性预激４０例，隐匿性预激１９例。除２例心房扑动和１例自律性房性心动过速外，７５例患儿接受射频消蚀术治疗，７３例获成功。本研究提示，与成人相同，折返是小儿ＳＶＴ最常见的发生机制，以房室折返最为多见。房室折返和房室结折返性心动过速是射频消蚀术的良好适应证。更多还原

【Abstract】 Tofurtherclarifythemechanismofsupraventriculartachycardia(SVT),weusedintracardiacelectrophysiologictechniquetoexamine78childrenwithSVT.Theresultsshowedthatreentrywasthemostcommonecause.Ofthe78cases,59(76%)hadA-Vreentry;16(20%)hada-trioventricularnode(AVN)reentry,and1case(1%)wasautonomicatrialtachycardia.Twocases(3%)werefoundtohaveatrialflutter(intraatrialreentry).Seventy-fivecasesweretreatedwithradiofrequencyablationandin73ofthemthetreatmentsucceeded.ThepresentstudysuggeststhatreentrymaybethemostcommonmechanismofSVTinchildrenandthatSVTcausedbyatrioven-tricularreentryorAVNreentryisagoodindicationfortreatmentwithradiofrequencyablation.更多还原