title: Effect of catecholamines, histamine and oxyfedrine on isotonic contraction and cyclic AMP in the guinea-pig heart.
mesh_terms: D000818:Animals; D000242:Cyclic AMP / Q000032:analysis; D004336:Drug Antagonism; D004357:Drug Synergism; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects / Q000502:physiology*; D006632:Histamine / Q000494:pharmacology*; D007093:Imidazoles / Q000494:pharmacology; D066298:In Vitro Techniques; D007545:Isoproterenol / Q000494:pharmacology*; D009206:Myocardium / Q000032:analysis; D009638:Norepinephrine / Q000494:pharmacology*; D010477:Perfusion; D011427:Propiophenones / Q000494:pharmacology*; D013806:Theophylline / Q000494:pharmacology
chemical_list: D007093:Imidazoles; D011427:Propiophenones; D006632:Histamine; D013806:Theophylline; D000242:Cyclic AMP; D007545:Isoproterenol; D009638:Norepinephrine