title: Intracellular cyclic nucleotides and contractility of the hypodynamic frog ventricle [proceedings].
mesh_terms: D000818:Animals; D001001:Anura; D000242:Cyclic AMP / Q000378:metabolism*; D006152:Cyclic GMP / Q000378:metabolism*; D006352:Heart Ventricles / Q000378:metabolism; D066298:In Vitro Techniques; D009200:Myocardial Contraction; D009206:Myocardium / Q000378:metabolism
chemical_list: D000242:Cyclic AMP; D006152:Cyclic GMP