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经射频导管消融（ＲＦＣＡ）治疗３．５～１４岁儿童阵发性室上性心动过速（ＰＳＶＴ）１００例，探讨ＲＦＣＡ治疗儿童ＰＳＶＴ的安全性及疗效。１００例中房室折返性心动过速（ＡＶＲＴ）７９例，慢－快型房室结折返性心动过速（ＡＶＮＲＴ）２１例。首次消融成功９６例（９６％）。失败４例均为ＡＶＲＴ。平均Ｘ线曝光时间１９ｍｉｎ。除２例ＡＶＮＲＴ放置导管过程中发生一过性ＩＩ度房室阻滞（ＡＶＢ）外，余术中和术后均无并发症发生。术后随访１个月～４．５年，ＡＶＲＴ复发１例，ＡＶＮＲＴ复发４例（占２１例的１９％），总复发率５％。结论：①ＲＦＣＡ治疗儿童ＰＳＶＴ安全、有效。②因儿童的ＡＶＮＲＴ消融慢径易出现ＡＶＢ且复发率高，应严格掌握手术适应证。③术中Ｘ线曝光时间应＜４０ｍｉｎ。
100 cases of paroxysmal supraventricular tachycardia (PSVT) in children aged 3.5 to 14 years were treated with radio frequency catheter ablation (RFCA) to explore the safety and efficacy of RFCA in children with PSVT. Among the 100 cases, 79 were atrioventricular reentrant tachycardia (AVRT) and 21 were slow-fast atrioventricular nodal reentrant tachycardia (AVNRT). The first successful ablation of 96 cases (96%). The failure of 4 cases were AVRT. The average X-ray exposure time 19min. Except for two cases of AVNRT during catheterization, there was no complications during and after surgery. Follow-up 1 month to 4.5 years, 1 case of AVRT recurrence, 4 cases of AVNRT recurrence (19% of 21 cases), the total recurrence rate was 5%. Conclusion: ①RFCA treatment of children with PSVT safe and effective. ② due to AVNRT ablation slow path prone to AVB and high recurrence rate, surgical indications should be strictly controlled. ③ intraoperative X-ray exposure time should be <40min.