title: The questionable role of cyclic guanosine 3':5'-monophosphate in heart.
mesh_terms: D000318:Adrenergic beta-Agonists / Q000494:pharmacology; D000818:Animals; D002794:Choline / Q000494:pharmacology; D006152:Cyclic GMP / Q000502:physiology*; D006321:Heart / Q000502:physiology*; D006801:Humans; D066298:In Vitro Techniques; D008688:Methacholine Compounds / Q000494:pharmacology; D009200:Myocardial Contraction / Q000187:drug effects; D009599:Nitroprusside / Q000494:pharmacology
chemical_list: D000318:Adrenergic beta-Agonists; D008688:Methacholine Compounds; D009599:Nitroprusside; D006152:Cyclic GMP; D002794:Choline