title: Excitation and contraction in heart: the role of calcium.
mesh_terms: D000200:Action Potentials; D000818:Animals; D002118:Calcium / Q000502:physiology*; D004285:Dogs; D006321:Heart / Q000502:physiology*; D007473:Ion Channels / Q000502:physiology; D009200:Myocardial Contraction
chemical_list: D007473:Ion Channels; D002118:Calcium