title: The action of g-strophanthin on bullfrog heart muscles in a sodium-free solution.
mesh_terms: D000200:Action Potentials / Q000187:drug effects; D000818:Animals; D001001:Anura; D006321:Heart / Q000187:drug effects*; D008094:Lithium / Q000494:pharmacology; D009119:Muscle Contraction / Q000187:drug effects; D010042:Ouabain / Q000494:pharmacology*; D011892:Rana catesbeiana; D012964:Sodium / Q000494:pharmacology*; D013268:Stimulation, Chemical
chemical_list: D010042:Ouabain; D008094:Lithium; D012964:Sodium