@misc{indiciae8493e6fd09ed,
  title = {Pacemaker upgrades from ventricular to dual chamber.},
  author = {R Sutton},
  year = {1999},
  doi = {10.1053/eupc.1999.0044},
  url = {https://pubmed.ncbi.nlm.nih.gov/11225791/},
  note = {Source identifier: 11225791}
}