Catheter ablation of intra-atrial reentrant tachycardias achieved a 66% success rate over 105 months, with significant differences between giant and non-giant right atrium groups (P<0.01).
Cohort (n=106)
Does linear catheter ablation guided by pace-map and entrainment mapping improve long-term success of intra-atrial reentrant tachycardias in patients with prior repair of congenital heart disease?
Entrainment mapping and pace-mapping combined with 3D electroanatomic mapping is an effective strategy for identifying critical isthmuses and achieving successful linear ablation of IARTs in patients with prior congenital heart disease repair.
p-value: p=<0.01
Introduction: The aim of this study was to develop bidirectional block of intra-atrial reentrant tachycardias (IARTs) late after the repair of congenital heart disease (CHD) using pace-map and entrainment mapping.Methods and results: There were 106 patients enrolled in this study. These patients were divided into two groups as giant right atrium (RA) group and non-giant RA group based on their RA volume measured by Carto. All patients have performed activation and entrainment mapping among these patients, 24 (22.6%) of Giant RA group had dual-loop reentry and 82 patients had single loop reentry. 94 patients (88.7%) found out the gaps by pace-map in SR. Linear ablation was successful in 105 patients (99%). During a mean follow-up period of 105 ± 34 months the success rate of IARTs was 66%, there were significantly different in these two groups(P<0.01). Seven (6.6%) patients in Giant RA group undergone redo procedure.Conclusion: Entrainment mapping in tachycardia and pace-map combined with three-dimensional electroanatomic mapping can elaborate the mechanism of complex re-entry circuits and critical isthmuses as targets for ablation. Pace-map in SR may be a good method for seeking the gap of ablation line to be bidirectional block for linear ablation IARTs.
Luo et al. (Mon,) conducted a cohort in Intra-atrial reentrant tachycardias (IARTs) after repair of congenital heart disease (n=106). Catheter ablation using pace-map and entrainment mapping vs. Non-giant right atrium (RA) group was evaluated on Long-term success rate of IARTs ablation (p=<0.01). Catheter ablation of intra-atrial reentrant tachycardias achieved a 66% success rate over 105 months, with significant differences between giant and non-giant right atrium groups (P<0.01).