@misc{indiciae51add46c32aa,
  title = {Atrial flutter: progress, but no final answer.},
  author = {H J Wellens},
  year = {1991},
  doi = {10.1016/0735-1097(91)90858-7},
  url = {https://pubmed.ncbi.nlm.nih.gov/2007724/},
  note = {Source identifier: 2007724}
}