title: The dependence on contraction frequency of the positive inotropic effect of dihydro-ouabain.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D004558:Electric Stimulation; D006168:Guinea Pigs; D006339:Heart Rate; D066298:In Vitro Techniques; D009200:Myocardial Contraction / Q000187:drug effects*; D010042:Ouabain / Q000031:analogs & derivatives* / Q000494:pharmacology; D010210:Papillary Muscles / Q000187:drug effects; D013268:Stimulation, Chemical
chemical_list: D010042:Ouabain; D002118:Calcium