Outcomes of atrioventricular nodal reentrant tachycardia ablation using three-dimensional electroanatomical mapping

Objective: This study aimed to evaluate the efficacy of conventional 2D ablation and three-dimensional electroanatomical mapping–guided ablation (3D ablation) in the treatment of atrioventricular nodal reentrant tachycardia (AVNRT) Method: 245 patients of AVNRT were divided to 2 groups. Group I consisted of 185 patients who underwent the conventional catheter ablation. Group II consisted of 60 patients who underwent the ablation using 3D electroanatomical mapping. Results: The successful rate was 100% in both groups. The fluoroscopy time of group I was significantly longer than the group II (283.99 ± 134.14 seconds versus 77.27 ± 48.01 seconds; p<0.001). The procedure time and RF delivery time of group I were significantly shorter than the group II (43.73 ± 8.51 minutes versus 51.67 ± 10.52 minutes; p<0.05) and (53.44 ± 33.87 seconds versus 71.28 ± 47.47 seconds; p<0.01) respectively. The number of RF application of group I was significantly lower than the group II (2.85 ± 1.58 times versus 3.58 ± 2.82 times; p < 0.05). The total dose area product of group I was significantly higher than the group II (2.18 ± 1.61 Gy-cm2 versus 0.49 ± 0.48 Gy-cm2; p < 0.001). After 6 month follow-up, 0.5% in group I and 1.6% in group II had a recurrence of AVNRT. Conclusion: The fluoroless catheter ablation for AVNRT can reduce fluoroscopy time. However, the fluoroless catheter ablation can increase the procedure time, number of RF application and RF delivery time compared to conventional catheter ablation.