Shortening of cardiac action potential duration near an insulating boundary.

@article{Cain2008ShorteningOC,
  title={Shortening of cardiac action potential duration near an insulating boundary.},
  author={John W. Cain and David G. Schaeffer},
  journal={Mathematical medicine and biology : a journal of the IMA},
  year={2008},
  volume={25 1},
  pages={21-36}
}
It is known, from both experiments and simulations, that cardiac action potentials are shortened near a non-conducting boundary. In the present paper, this effect is studied in a simple, two-current ionic model, with propagation restricted to a 1D fibre. An asymptotic approximation for the dependence of action potential duration on distance to the boundary is derived. This estimate agrees well with simulations. 

References

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