title: Myocardial alpha adrenergic receptors and their role in the production of a positive inotropic effect by sympathomimetic agents.
mesh_terms: D000818:Animals; D004558:Electric Stimulation; D004837:Epinephrine / Q000494:pharmacology; D004983:Ethanolamines / Q000494:pharmacology; D006168:Guinea Pigs; D006321:Heart / Q000187:drug effects*; D006325:Heart Atria / Q000187:drug effects; D066298:In Vitro Techniques; D007545:Isoproterenol / Q000494:pharmacology; D009119:Muscle Contraction / Q000187:drug effects*; D009638:Norepinephrine / Q000494:pharmacology; D010643:Phenoxybenzamine / Q000494:pharmacology; D010646:Phentolamine / Q000494:pharmacology; D010656:Phenylephrine / Q000494:pharmacology; D011955:Receptors, Drug / Q000502:physiology*; D013566:Sympathomimetics / Q000494:pharmacology*
chemical_list: D004983:Ethanolamines; D011955:Receptors, Drug; D013566:Sympathomimetics; D010643:Phenoxybenzamine; D010656:Phenylephrine; D007545:Isoproterenol; D009638:Norepinephrine; D004837:Epinephrine; D010646:Phentolamine