Limitations:
Firstly, the included studies had different study protocols, including
both randomized and nonrandomized trials. Secondly, the precise
techniques of CBA for PVI and PWI might differ between different
operators, while two of our studies used adjunct RFA, which might
explain the high heterogeneity found in total ablation time. Thirdly,
our sample size is small, too small to compare rare events such as AE
fistula. Therefore, more randomized trials with larger populations are
needed in the future.