title: Electrical activity of the heart.
mesh_terms: D000200:Action Potentials; D002463:Cell Membrane Permeability; D002712:Chlorides / Q000378:metabolism; D006321:Heart / Q000294:innervation / Q000502:physiology*; D006329:Heart Conduction System / Q000502:physiology; D006801:Humans; D008564:Membrane Potentials; D009206:Myocardium / Q000378:metabolism; D010138:Pacemaker, Artificial; D010275:Parasympathetic Nervous System / Q000502:physiology; D011188:Potassium / Q000378:metabolism; D012964:Sodium / Q000378:metabolism; D013564:Sympathetic Nervous System / Q000502:physiology
chemical_list: D002712:Chlorides; D012964:Sodium; D011188:Potassium