title: Excitation-contraction coupling and digitalis.
mesh_terms: D000200:Action Potentials / Q000187:drug effects; D002118:Calcium / Q000378:metabolism*; D004071:Digitalis Glycosides / Q000494:pharmacology*; D006329:Heart Conduction System / Q000187:drug effects / Q000378:metabolism / Q000502:physiology*; D006801:Humans; D008564:Membrane Potentials / Q000187:drug effects; D009119:Muscle Contraction; D009206:Myocardium / Q000378:metabolism*
chemical_list: D004071:Digitalis Glycosides; D002118:Calcium