[Pacemaker cell and its automaticity].
D000200:Action Potentials; D000818:Animals; D001001:Anura; D002415:Cats; D004285:Dogs; D006168:Guinea Pigs; D006329:Heart Conduction System / Q000502:physiology*; D011188:Potassium / Q000502:physiology; D011690:Purkinje Fibers / Q000502:physiology*; D012849:Sinoatrial Node / Q000502:physiology
D011188:Potassium