Forward and inverse problems of electrocardiography: Modeling and recovery of epicardial potentials in humans. Shahidi, A.; Savard, P.; and Nadeau, R. j-BME, 41(3):249--256, 1994.
bibtex   
@Article{RSM:Sha94b,
  author =       "A.V. Shahidi and P. Savard and R. Nadeau",
  title =        "Forward and inverse problems of electrocardiography:
                 {M}odeling and recovery of epicardial potentials in
                 humans",
  journal =      j-BME,
  year =         "1994",
  volume =       "41",
  number =       "3",
  pages =        "249--256",
  robnote =      "A paper with an overview of several different methods
                 with at least some description of some different
                 regularization methods too. Findings of comparison with
                 clinical data from WPW patients were surprising: lower
                 res model did beter than high res; homogeneous torso
                 did better than inhomogeneous; simple Tikhonov reg with
                 energy upper bound was best regularization; and simple
                 distributions (early in pre-excitation) were better
                 reconstructed than complex ones (45 msec into the
                 beat). They have problems getting alignment between
                 electrodes and nodes on epicardium (derive a special
                 forward matrix by energizing each element which
                 encloses an electrode instead of interpolation to the
                 epicardial nodes)",
}
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