@misc{indiciae68e1ab1f85dd,
  title = {ECG file: second and third degree heart block.},
  author = {S Thomas},
  doi = {10.7748/ns.5.11.28.s46},
  url = {https://pubmed.ncbi.nlm.nih.gov/2124840/},
  note = {Source identifier: 2124840}
}