title: Endogenous 3',5'-cyclic nucleotides, calcium and the regulation of myocardial contractility: a hypothesis [proceedings].
mesh_terms: D000818:Animals; D001001:Anura; D002118:Calcium / Q000502:physiology*; D000242:Cyclic AMP / Q000502:physiology*; D006152:Cyclic GMP / Q000502:physiology*; D066298:In Vitro Techniques; D009200:Myocardial Contraction
chemical_list: D000242:Cyclic AMP; D006152:Cyclic GMP; D002118:Calcium