@misc{indiciaefb26ed9a59a5,
  title = {Ventricular tracking pacemaker.},
  author = {W E Chapman},
  year = {1973},
  doi = {10.1080/00325481.1973.11713494},
  url = {https://pubmed.ncbi.nlm.nih.gov/4707884/},
  note = {Source identifier: 4707884}
}