AVNRT cryoablation in children <26 kg: efficacy and safety of electrophysiologically guided low‐voltage bridge strategy

Abstract

AbstractThe recently published “electrophysiologically guided low‐voltage bridge (LVB) strategy” is effective in the ablation of atrioventricular nodal re‐entry tachycardia (AVNRT) in children. This study aimed to evaluate its efficacy and safety in children <26 kgs. Fourteen children [64% males, median age 6.5 years (IQR 6–8 years), median weight 25.5 kg (IQR 24–26 kg)] with AVNRT were treated. In all patients, we detected a LVB associated to a typical slow pathway potential. The acute success rate was 100% with a mean of 5.5 cryoablation deliveries. All procedures were performed with near‐zero fluoroscopic exposure (median time 0.15 min, IQR 0–0.7 min), in six patients fluoroscopy was 0 min. There were no complications or recurrences during the follow‐up (median 20.91 months, IQR 11.7–26.7 months).