@misc{indiciaee9e3c3566088,
  title = {P wave morphology.},
  author = {P Puech},
  year = {1990},
  doi = {10.1111/j.1749-6632.1990.tb37287.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/2221680/},
  note = {Source identifier: 2221680}
}