@misc{indiciae9d2160686ae9,
  title = {An unusual case of second-degree A-V block--a study using His bundle electrograms.},
  author = {W J Mandel and A Kermaier and H N Allen and H Hayakawa},
  year = {1972},
  doi = {10.1378/chest.61.1.37},
  url = {https://pubmed.ncbi.nlm.nih.gov/5049499/},
  note = {Source identifier: 5049499}
}