@misc{indiciae6430161659cf,
  title = {Pacemaker update 1984. Part IV. DDD pacemaker--electrocardiographic assessment and problem solving.},
  author = {M M Parker and L Lemberg},
  year = {1984},
  url = {https://pubmed.ncbi.nlm.nih.gov/6567643/},
  note = {Source identifier: 6567643}
}