Discussion
AVNRT
In contrast with its typical form, Literature data on atypical AVNRT need to be revised because of its low prevalence. Atypical AVNRT has been identified as a predictor of lower ablation success rates, and the optimal method of catheter ablation still needs to be established. The same anatomic site and nature of the pathways involved in the atypical AVNRT have yet to be recognized, and efforts to provide a reasonable hypothesis based on anatomic or anisotropic models have been made [In contrast to our result, Katritsis et al. studied 2079 patients with AVNRT, of whom 113 were cases of atypical AVNRT or coexistent typical and atypical AVNRT. They found that ablation in the conventional area is the treatment of choice in typical and atypical patients [Our study had some notable strengths, especially 48-month patient follow-up. The limitation of our study was the small sample size. We recommend further studies with more cases of atypical AVNRT.