title: Proceedings: Cardiac pace-maker currents and extracellular pH.
mesh_terms: D000818:Animals; D002417:Cattle; D006329:Heart Conduction System / Q000502:physiology*; D006863:Hydrogen-Ion Concentration; D008564:Membrane Potentials; D010138:Pacemaker, Artificial; D011690:Purkinje Fibers / Q000502:physiology*; D012756:Sheep