目的 总结儿童房室折返性心动过速的临床特点、电生理特性，并探讨射频消融治疗房室折返性心动过速的 疗效及安全性。方法 回顾分析2014年10月至2020年4月期间接受射频消融治疗的房室折返性心动过速患儿的临床资 料。结果 共收集83例患儿，其中男48例、女35例，平均年龄（9.48±2.88）岁。左侧旁道53例，成功消融51例，复发3例； 右侧旁道25例，成功消融25例，复发6例；双旁道5例，成功消融5例，复发1例。83例患儿的手术即时成功率为97.6%， 复发率12 . 3 %，并发症发生率6.0%；83例患儿平均累计消融时间（149.8±42 . 2）s。左侧单房室旁道组的平均累计消融 时间为（140 . 2±36.3）s，右侧单房室旁道组为（170 . 0±47.3）s，组间差异有统计学意义（P=0.003）。右侧旁道（24.0%） 消融后的复发率高于左侧旁道（5.7%），差异有统计学意义（χ 2 = 3 . 95，P= 0 . 047）。结论 射频消融治疗儿童房室折返性 心动过速是安全、有效的，但有一定比例的复发可能性，且右侧旁道复发率高于左侧。

Objective To summarize the clinical and electrophysiological characteristics of atrioventricular reentrant tachycardia in children, and to explore the efficacy and safety of radiofrequency catheter ablation in the treatment of atrioventricular reentrant tachycardia. Method The clinical data of children with atrioventricular reentrant tachycardia treated by radiofrequency catheter ablation from October 2014 to April 2020 were retrospectively analyzed. Results In 83 children ( 48 males and 35 females) with an average age of ( 9 . 48 ±2 . 88 ) years, there were 53 cases of left accessory pathway, in whom 51 cases had successful ablation and 3 cases had recurrence. There were 25 cases of right accessory pathway, in whom 25 cases had successful ablation and 6 cases had recurrence. There were 5 cases of double accessory pathway, in whom 5 cases had successful ablation and 1 case had recurrence. The immediate success rate, recurrence rate and complication rate of 83 cases were 97 . 6 %, 12 . 3 % and 6 . 0 % respectively. The average cumulative ablation time was ( 149 . 8 ± 42 . 2 ) s. The average cumulative ablation time was ( 140 . 2 ±36 . 3 ) s in the left-sided single atrioventricular accessory pathway group and ( 170. 0±47 . 3 ) s in the right-sided single atrioventricular accessory pathway group, and the difference between two groups was statistically significant (P=0.003). The recurrence rate in the right accessory pathway (24.0%) was higher than that in the left accessory pathway (5.7%), and the difference was statistically significant (χ2 = 3 . 95 , P= 0 . 047 ). Conclusion Radiofrequency catheter ablation is safe and effective in the treatment of atrioventricular reentrant tachycardia in children, but there is a certain probability of recurrence and the recurrence rate in the right accessory pathway is higher than that in the left accessory pathway.