@misc{indiciaec8dbeee6a403,
  title = {P wave tracking above the maximum tracking rate in a DDDR pacemaker.},
  author = {S T Higano and D L Hayes},
  year = {1989},
  doi = {10.1111/j.1540-8159.1989.tb01924.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2476739/},
  note = {Source identifier: 2476739}
}