Abstract

Comparison of Conventional and Flouroless Catheter Ablation for Focal Atrial Tachycardia

Author(s): Pham Nhu Hung, Trinh Dinh Hoang, Nguyen Van Dan, Nguyen Xuan Tuan, Pham Van Tung

Objective: This study sought to evaluate conventional and flouroless catheter ablation for focal atrial tachycardia.

Method: 112 patients of atrial tachycardia were divided into 2 groups. Group I consisted of 73 patients who underwent conventional catheter ablation. Group II consisted of 43 patients who underwent the flouroless catheter ablation (39 patients of the first procedure and 4 patients met with failure of the conventional catheter ablation)

Results: The first procedure acute successful rate in group II was significantly higher than in group I (94.8% versus 86.3%, respectively; p<0.05). The fluoroscopy time, and radiofrequency delivery time of group I was significantly longer than the group II, respectively (904.26 ± 547.56 seconds in group I versus 169.21 ± 85.66 seconds in group II; p<0.001); (157.32 ± 81.82 seconds in group I versus 95.87 ± 55.24 seconds in group II; p<0.001). The number of radiofrequency applications of group I was significantly higher than group II (8.65 ± 8.15 times versus 6.05 ± 4.69 times respectively; p<0.01). However, there was no significant difference between 2 groups in procedure time (78.71 ± 38.76 minutes in group I versus 76.34 ± 36.48 minutes in group II; p=NS). After 6 months follow-up, 7.9% in group I and 5.3% in group II had a recurrence of atrial tachycardia.

Conclusion: The fluoroless catheter ablation enhanced a more successful rate than the conventional catheter ablation. The fluoroless catheter ablation can reduce fluoroscopy time, radiofrequency delivery time and the number of radiofrequency applications compared to conventional catheter ablation.