@misc{indiciae5c6526aca69f,
  title = {M mode echocardiogram and abnormal structures behind the left atrium.},
  author = {T H Goh and A W Venables},
  year = {1979},
  doi = {10.1016/0002-9149(79)90415-6},
  url = {https://pubmed.ncbi.nlm.nih.gov/474436/},
  note = {Source identifier: 474436}
}