@misc{indiciaec2e187e94c4c,
  title = {Evolution of echocardiography.},
  author = {H Feigenbaum},
  year = {1996},
  doi = {10.1161/01.cir.93.7.1321},
  url = {https://pubmed.ncbi.nlm.nih.gov/8641018/},
  note = {Source identifier: 8641018}
}