@misc{indiciaec37fb95bc613,
  title = {Second-degree atrioventricular block and the haystack principle.},
  author = {David H Spodick},
  doi = {10.1111/j.1076-7460.2006.05070.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/16415651/},
  note = {Source identifier: 16415651}
}