title: A note on the phase-plane technique representation of cardiac action potentials.
abstract: In this study the applicability of the phase-plane technique for interpreting membrane properties of cardiac cells in a two-dimensional structure is discussed. The conditions are derived for which the effects of two-dimensionality of a sheet can be neglected and for which the one-dimensional phase-plane technique for estimation of the membrane current densities remains valid. The usual phase-plane technique appears to be applicable to nodal and atrial tissue.
mesh_terms: D000200:Action Potentials; D016275:Atrial Function; D001283:Atrioventricular Node / Q000502:physiology; D006321:Heart / Q000502:physiology*; D008564:Membrane Potentials