Optimal method for ablation of atypical AVNRT

BMC Cardiovascular Disorders

Research

Amir Aslani¹  Hamed Bazrafshan²  Mehdi Bazrafshan³  Mahdi Rahmanian³  Reza Fakhar³  Shahab Shahrzad⁴  Hanieh bazrafshan⁵  Kasra Pirahesh⁶ 

[1]Cardiology Department, Shiraz University of Medical Sciences, Shiraz, Iran

[2]Cardiology Department, Shiraz University of Medical Sciences, Shiraz, Iran

[3]Cardiovascular Research Center, Shiraz University of Medical Sciences, Shiraz, Iran

[4]Cardiovascular Research Center, Shiraz University of Medical Sciences, Shiraz, Iran

[5]Fars Heart Foundation, Kowsar Hospital, Shiraz, Iran

[6]Neurology Research Center, Shiraz University of Medical Sciences, Shiraz, Iran

[7]Tehran University of Medical Sciences, Tehran, Iran

关键词: Atypical AVNRT;    Ablation;    Slow pathway;   

DOI  :  10.1186/s12872-023-03305-9

 received in 2022-11-18, accepted in 2023-05-16,  发布年份 2023

来源: Springer

【 摘 要 】

BackgroundConsidering that ablation of atypical AVNRT may be unsuccessful after ablation at the right posterior septum, in this study, we aimed to present an optimal method for ablation of atypical AVNRT. Also, we evaluated the efficacy of this technique for preventing recurrences.MethodsThis is a prospective, double-center study. It was conducted on 62 patients with atypical AVNRT referred for radiofrequency ablation. The patients were randomly divided into two groups before ablation: 1-Group A (n = 30): treated with conventional ablation at the anatomic area of the slow pathway; 2-Group B (n = 32): ablation was done 2 mm higher in the septum during fluoroscopy.ResultsThe mean age of patients in groups A and B were 54 ± 11.7 and 55 ± 12.2, respectively (P = 0.43). In group A, ablation was successful in 24 (80%) patients following right-sided slow pathway ablation, and the remaining patients required further treatment with either a left-side approach (N = 4, 13.3%) or ablation of additional regions (N = 2, 6.7%). In group B, ablation was successful in all patients. After a 48-month follow-up, recurrence of symptomatic atypical AVNRT was detected in 4 (13.3%) patients of group A and none of group B patients (p < 0.001).ConclusionIn patients with atypical AVNRT, ablation 2 mm above the conventional area is more promising regarding success rate and recurrence of the arrhythmia.

【 授权许可】

CC BY   
© The Author(s) 2023