The RHYTHMIA mapping system was technically feasible and safe for catheter ablation in pediatric patients under 20 kg, with no major procedural complications.
Does the RHYTHMIA mapping system provide comparable mapping parameters and safety in pediatric patients weighing <20 kg compared to those ≥20 kg undergoing ablation for supraventricular arrhythmias?
The RHYTHMIA high-density mapping system is technically feasible and safe for catheter ablation of supraventricular arrhythmias in pediatric patients weighing less than 20 kg.
Absolute Event Rate: 0% vs 0%
ABSTRACT Background Catheter ablation in pediatric patients remains technically challenging. The RHYTHMIA high‐density mapping system is increasingly used in pediatric electrophysiology; however, procedural experience in patients weighing less than 20 kg is limited. Methods We retrospectively analyzed 125 pediatric patients who underwent catheter ablation for supraventricular arrhythmias using the RHYTHMIA system. The patients were divided into two groups according to body weight: ≥20 kg group ( n = 111) and the <20 kg group ( n = 14). The mapping time, number of mapping beats, and mapping electrodes were compared for the right atrium (RA), and left atrium (LA), along with the manual re‐annotation points and incidence of complications. Results A total of 184 maps were analyzed. No significant differences were found in mapping time, accepted beats, and electrograms (RA, ≥20 kg group n = 104 vs. <20 kg group n = 11; mapping time, 13.8 min10.1–18.3 vs. 17.4 min9.4–25.3, p = 0.95; accepted beats, 744 beats548–1095 vs. 953 beats654–1079, p = 0.57; electrograms, 6871 electrograms5074–10885 vs. 6650 electrograms4474–9527, p = 0.30) (LA, ≥20 kg group n = 62 vs. <20 kg group n = 7; mapping time, 11.5 min8.1–18.3 vs. 14.5 min8.5–15.4, p = 0.97; accepted beats, 619 beats354–1007 vs. 512 beats316–810, p = 0.89; electrograms, 6809 electrograms4025–10108 vs. 4338 electrograms3369–8693, p = 0.93). In the RA, <20 kg group required more re‐annotations than ≥20 kg group, while no significant differences in complications were observed between the groups. Conclusions Use of the RHYTHMIA mapping system in carefully selected pediatric patients weighing less than 20 kg was technically feasible and not associated with major procedural complications. These findings support its cautious use with appropriate case selection and operator vigilance.
Sasaki et al. (Wed,) reported a other. The RHYTHMIA mapping system was technically feasible and safe for catheter ablation in pediatric patients under 20 kg, with no major procedural complications.