The precision of electrophysiological mapping: Localizing depolarization wave fronts from digitized extracellular electrograms and the role of data sampling rate. Rosenbaum, D., Kaplan, D., Wilber, D., Saul, J., Ruskin, J., & Garan, H. j-JCE, 1:2–14, 1990.
bibtex   
@Article{RSM:Ros90,
  author =       "D.S. Rosenbaum and D.T. Kaplan and D.J. Wilber and
                 J.P. Saul and J.N. Ruskin and H. Garan",
  title =        "The precision of electrophysiological mapping:
                 {L}ocalizing depolarization wave fronts from digitized
                 extracellular electrograms and the role of data
                 sampling rate",
  journal =      j-JCE,
  year =         "1990",
  volume =       "1",
  month =        "",
  pages =        "2--14",
  robnote =      "Arrhythmias, used bipole leads derived from unipolar
                 measurements and compared manual against algorithmic
                 methods for finding activation time. Found 10ms
                 variation between repeated manual evaluation and
                 derived from this an error of about 1 cm in localizing
                 earliest sites of acvitvation. They used a chronic
                 infarct model and so had cases of delayed conduction in
                 the mix.",
}

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