One-year Recurrence Rate of Atrioventricular Nodal Reentrant Tachycardia Following Radiofrequency Catheter Ablation: A Comparative Study Between No Residual Slow Pathway versus Residual Slow Pathway Conduction in Uttaradit Hospital
Keywords:
AVNRT, slow pathway, RFCA, recurrenceAbstract
Objective: To compare the recurrence rate of AVNRT 1-year period between patients who underwent RFCA treatment until the slow pathway was completely eliminated and patients who still have a residual slow pathway but cannot provoke AVNRT.
Methods: The study is a retrospective cohort study of AVNRT patients who were received RFCA treatment between January 1, 2016 and January 1, 2024 with follow-up for 1 year after RFCA. The recurrence rate of AVNRT was compared between the group with a residual slow pathway and the group with no slow pathway remaining.
Results: The patients diagnosed with AVNRT who underwent EP study and RFCA at Uttaradit Hospital between January 1, 2016 and January 1, 2024 the RFCA success rate was 93.9%. The overall complication rate for RFCA in AVNRT patients was 0.6%, with one case of transient AV block. The 1-year recurrence rate after RFCA in AVNRT patients who underwent treatment with no remaining slow pathway was compared to those with a residual slow pathway but unable to provoke AVNRT. The recurrence rates were not significantly different statistically, with a recurrence rate of 1% in the group with no remaining slow pathway and 6.5% in the group with a residual slow pathway, yielding adjusted hazard ratio of 7.8 (95% CI 0.76-79.83), p=0.083.
Conclusions: The 1-year recurrence rate after RFCA in AVNRT patients who underwent treatment with no remaining slow pathway was compared to those with a residual slow pathway but unable to provoke AVNRT, and there was no statistically significant difference.
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