Study population
AVNRT
RECURRENCE
This research is a prospective, double-center study. It was conducted on 62 patients with atypical AVNRT referred for radiofrequency ablation (2013–2019). All patients with symptomatic AVNRT with at least one episode every two months were included in this study. Those patients who underwent ablation therapy and developed recurrence were excluded. Demographic and clinical data were recorded before ablation. The patients were randomly divided into two groups before ablation based on random digit number: 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). This study was approved by the Ethics Committee of the Shiraz University of Medical Sciences (IR.SUMS.MED.REC.1396.04), and written informed consent was obtained from the subjects.