Clinical Evaluation Of Radiofrequency Catheter Ablation In The Treatment Of Atrioventricular Reentrant Tachycardia In Children

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 2014to 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 1case 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(χ~2=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.