title: Contractions and potassium-contractures of heart muscle in sodium-free solutions.
mesh_terms: D000818:Animals; D002118:Calcium / Q000494:pharmacology; D003530:Cyprinidae; D006321:Heart / Q000187:drug effects / Q000502:physiology*; D066298:In Vitro Techniques; D009119:Muscle Contraction; D009994:Osmolar Concentration; D011188:Potassium / Q000494:pharmacology; D012964:Sodium / Q000494:pharmacology*; D016276:Ventricular Function
chemical_list: D012964:Sodium; D011188:Potassium; D002118:Calcium