The prolonged P wave and interatrial block. Time to consider a broader concept and different terminology.

@article{Boineau2005ThePP,
  title={The prolonged P wave and interatrial block. Time to consider a broader concept and different terminology.},
  author={John P. Boineau},
  journal={Journal of electrocardiology},
  year={2005},
  volume={38 4},
  pages={327-9}
}