title: Heart: excitation and contraction.
mesh_terms: D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D001665:Binding Sites; D001693:Biological Transport, Active; D002118:Calcium / Q000378:metabolism; D002478:Cells, Cultured; D004594:Electrophysiology / Q000379:methods; D004837:Epinephrine / Q000494:pharmacology; D006329:Heart Conduction System / Q000502:physiology*; D006352:Heart Ventricles / Q000033:anatomy & histology; D007700:Kinetics; D008345:Manganese / Q000494:pharmacology; D008564:Membrane Potentials / Q000187:drug effects; D008566:Membranes / Q000502:physiology; D009200:Myocardial Contraction / Q000187:drug effects; D010539:Permeability; D011188:Potassium / Q000378:metabolism; D011690:Purkinje Fibers / Q000502:physiology; D012964:Sodium / Q000378:metabolism; D013268:Stimulation, Chemical; D013696:Temperature; D013779:Tetrodotoxin / Q000494:pharmacology; D016276:Ventricular Function
chemical_list: D008345:Manganese; D013779:Tetrodotoxin; D012964:Sodium; D011188:Potassium; D002118:Calcium; D004837:Epinephrine