@misc{indiciaeac353a02074d,
  title = {DDD pacing: clinical considerations.},
  author = {P J Vatterott and R E Vlietstra and D L Hayes},
  year = {1987},
  doi = {10.1016/s0025-6196(12)61883-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/3807437/},
  note = {Source identifier: 3807437}
}