Discussion
To the best of our knowledge, the present study is the first to investigate the performance of both the baseline and injection tool in assessing PV occlusion with the latest version of KODEX-EPD system. The major findings of the present study are: i) both tools were able to accurately assess the degree of PV occlusion in CBA procedure; ii) both tools could predict the acute cryoablation effect; iii) baseline tool showed a higher sensitivity, while injection tool showed a higher specificity.