@misc{indiciaecaa0fb0d797e,
  title = {Evaluating myocardial contractility.},
  author = {S Shimosato and B E Etsten},
  year = {1971},
  doi = {10.1097/00000542-197109000-00027},
  url = {https://pubmed.ncbi.nlm.nih.gov/5095549/},
  note = {Source identifier: 5095549}
}