The ionic nature of slow inward current and its relation to contraction.
D000200:Action Potentials; D000818:Animals; D002118:Calcium / Q000502:physiology; D002415:Cats; D004553:Electric Conductivity; D005071:Evoked Potentials; D005110:Extracellular Space / Q000502:physiology; D006321:Heart / Q000502:physiology*; D007477:Ions; D008564:Membrane Potentials; D009119:Muscle Contraction; D010210:Papillary Muscles / Q000502:physiology; D012964:Sodium / Q000502:physiology
D007477:Ions; D012964:Sodium; D002118:Calcium