@misc{indiciae21186c48c381,
  title = {Atrioventricular block. Localization and classification by His bundle recordings.},
  author = {O S Narula and B J Scherlag and P Samet and R P Javier},
  year = {1971},
  doi = {10.1016/0002-9343(71)90144-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/5545452/},
  note = {Source identifier: 5545452}
}