Remote magnetic navigation shows superior long-term outcomes in pediatric atrioventricular (nodal) tachycardia ablation compared to manual radiofrequency and cryoablation

Abstract Funding Acknowledgements Type of funding sources: None. Introduction – Catheter ablation (CA) is a first-choice treatment for tachyarrhythmia in pediatric patients. The currently available CA techniques differ manner catheter steering technique and energy sources. There are no large studies comparing long-term outcomes between the patients with atrioventricular reentry (also known as accessory pathway mediated) tachycardia (AVRT) or nodal (AVNRT) mechanisms. Objective aim this study was to compare procedural parameters remote magnetic navigation-guided radiofrequency (RF) (RMN), manual-guided RF (MAN) cryoablation (CRYO). Methods This single-center, retrospective included all first consecutive procedures AVRT AVNRT mechanisms performed structural heart disease from January 2008 until June 2019. Three groups were defined by used: RMN, MAN CRYO. Primary outcome recurrence and/or pre-excitation on ECG. Baseline clinical parameters, procedure times complication rates also evaluated. Results In total, we 223 patients, aged 13.8 ± 2.8 years, mean weight 55.6 14 kilograms. 108 using 76 39 Cryo. RMN had lowest at follow-up 5.5 2.9 years (AVRT ablation: 4% vs. 16% 55%, P < 0.001; 8% 36%, = 0.008; CRYO respectively). ablation, fluor comparable groups. However, significantly lower fluoroscopy compared Cryo (10 (IQR 7-14) 9 6-26) 15 10-22) minutes respectively, 0.040). Moreover, shortest second (101 87-121) 88 62-99) 120 88-143) 0.018). We observed minor complications 3 (1%), which major complications. Conclusion who underwent their AV(N)RT has most favorable outcomes, addition times. Figure.