title: Differentiation of inotropic mechanisms by experiments on cardiac contracture.
mesh_terms: D000818:Animals; D001693:Biological Transport, Active / Q000187:drug effects; D002118:Calcium / Q000494:pharmacology; D006168:Guinea Pigs; D066298:In Vitro Techniques; D008564:Membrane Potentials / Q000187:drug effects; D009638:Norepinephrine / Q000494:pharmacology*; D010042:Ouabain / Q000031:analogs & derivatives* / Q000494:pharmacology; D010210:Papillary Muscles / Q000187:drug effects / Q000502:physiology*; D011188:Potassium / Q000494:pharmacology; D012964:Sodium / Q000494:pharmacology; D013997:Time Factors; D014159:Transducers
chemical_list: D010042:Ouabain; D012964:Sodium; D011188:Potassium; D002118:Calcium; D009638:Norepinephrine