Abstract
Purpose
Organized atrial tachycardia (AT) accounts for a substantial proportion of recurrence after radiofrequency catheter ablation (RFCA) for atrial fibrillation (AF). We sought to analyze the characteristics and long-term outcome of redo RFCA for recurrent AT compared with those for recurrent AF.
Methods
We analyzed 133 patients who underwent prior AF ablation and presented for redo RFCA procedure. Documented rhythm at recurrence was AT in 50 patients (37.6%) and AF in 83 patients (62.4%). Redo ablation was conducted using a stepwise approach in all subjects.
Results
Recurrent arrhythmia was more frequently a persistent type in the AT group (70.0% vs. 36.1% in the AT and AF group, respectively, p < 0.001). Fifty mappable ATs were identified in the AT group. Perimitral reentry was most common (19/50), followed by PV-related focal or reentrant tachycardia (16/50). During the redo RFCA, PV reconnection rate and linear ablation rate were similar in the two groups, while the focal target ablation tended to be conducted more frequently in the AF group (26.0% vs. 42.2%, p = 0.060). The AT group showed a higher acute success rate (92.0% vs. 75.9%, p = 0.019) and higher arrhythmia freedom during a mean of 30 months (76.0% vs. 55.4%, p = 0.030), compared with the AF group. The AT group and de novo AF type (paroxysmal) were independent predictors for higher arrhythmia freedom.
Conclusions
RFCA for recurrent AT following AF ablation showed favorable acute and long-term success rates and was associated with superior procedural outcomes compared with those for recurrent AF.
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Data availability
Data are not available for the public, but can be provided by relevant requests from investigators.
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CY drafted the manuscript. CY, KSH, and OYS enrolled the subjects and collected data. KS, PJY, KS, and KJY contributed to data interpretation and analysis. KTS, HYM, KJH, JSW, and LMY contributed to the article revision and data researching. OYS substantially contributed to the study conceptualization and the completion of the manuscript. All authors read and approved the final manuscript.
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Choi, Y., Kim, S., Baek, J.Y. et al. Acute and long-term outcome of redo catheter ablation for recurrent atrial tachycardia and recurrent atrial fibrillation in patients with prior atrial fibrillation ablation. J Interv Card Electrophysiol 61, 227–234 (2021). https://doi.org/10.1007/s10840-020-00795-x
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DOI: https://doi.org/10.1007/s10840-020-00795-x