title: The antagonism of the positive inotropic effect of histamine and noradrenaline by H1 and H2-receptor blocking agents.
mesh_terms: D000818:Animals; D003864:Depression, Chemical; D004305:Dose-Response Relationship, Drug; D006168:Guinea Pigs; D006339:Heart Rate / Q000187:drug effects; D006352:Heart Ventricles / Q000187:drug effects; D006632:Histamine / Q000494:pharmacology*; D006634:Histamine H1 Antagonists / Q000494:pharmacology*; D007093:Imidazoles / Q000494:pharmacology; D066298:In Vitro Techniques; D009638:Norepinephrine / Q000037:antagonists & inhibitors* / Q000494:pharmacology; D009994:Osmolar Concentration; D011955:Receptors, Drug / Q000187:drug effects*; D013440:Sulfides / Q000494:pharmacology; D013890:Thiourea / Q000031:analogs & derivatives / Q000494:pharmacology
chemical_list: D006634:Histamine H1 Antagonists; D007093:Imidazoles; D011955:Receptors, Drug; D013440:Sulfides; D006632:Histamine; D013890:Thiourea; D009638:Norepinephrine