@misc{indiciaeec0639c22655,
  title = {Electrocardiographic changes during endoscopy.},
  author = {G Sachdev and J C Vij and R Nanda and B S Anand and M Khalilullah},
  url = {https://pubmed.ncbi.nlm.nih.gov/3557508/},
  note = {Source identifier: 3557508}
}