Hyperpolarization and duration of the cardiac action potential.

@article{Walt1971HyperpolarizationAD,
  title={Hyperpolarization and duration of the cardiac action potential.},
  author={J Jurgens Van Der Walt and Edward E. Carmeliet},
  journal={Archives internationales de physiologie et de biochimie},
  year={1971},
  volume={79 1},
  pages={149-63}
}