Is the isolation of the pulmonary vein completed?

@article{Matsuo2009IsTI,
  title={Is the isolation of the pulmonary vein completed?},
  author={Seiichiro Matsuo and Teiichi Yamane and Seigo Yamashita and Michifumi Tokuda and Hiroshi Yoshida and Taro Date and Michihiro Yoshimura},
  journal={Journal of cardiovascular electrophysiology},
  year={2009},
  volume={20 11},
  pages={1292-3}
}