4.4 Study limitations
In our study population, the prevalence of successful CST cases was about 3% and the CST ablation technique was effective in 16 patients, which are small and may not have been adequate to derive any accurate factors for predicting a successful CST ablation. Additionally, whether the two factors derived could be useful predictors in the CB ablation setting was not evaluated owing to the retrospective non-randomized design of this study. Hence, these two factors should be evaluated in a prospective, randomized, multicenter study in the future.