title: Characterization of histamine H1-receptors in the guinea pig left atrium.
mesh_terms: D000818:Animals; D000242:Cyclic AMP / Q000502:physiology; D005260:Female; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects*; D006632:Histamine / Q000494:pharmacology; D066298:In Vitro Techniques; D007545:Isoproterenol / Q000494:pharmacology; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects; D011968:Receptors, Histamine / Q000187:drug effects*; D011969:Receptors, Histamine H1 / Q000187:drug effects*
chemical_list: D011968:Receptors, Histamine; D011969:Receptors, Histamine H1; D006632:Histamine; D000242:Cyclic AMP; D007545:Isoproterenol