title: A positive influence of frequency on the inotrophic response of isolated rat atria to certain adrenergic amines. Effects of cocaine and U-0521 (3',4'-dihydroxy-2-methyl propiophenone.
mesh_terms: D000818:Animals; D002122:Calcium Chloride / Q000494:pharmacology; D003042:Cocaine / Q000494:pharmacology*; D004347:Drug Interactions; D004558:Electric Stimulation; D006339:Heart Rate; D066298:In Vitro Techniques; D007545:Isoproterenol / Q000494:pharmacology; D008297:Male; D009200:Myocardial Contraction / Q000187:drug effects*; D009638:Norepinephrine / Q000494:pharmacology; D010656:Phenylephrine / Q000494:pharmacology; D011427:Propiophenones / Q000494:pharmacology*; D051381:Rats; D013566:Sympathomimetics / Q000494:pharmacology*
chemical_list: D011427:Propiophenones; D013566:Sympathomimetics; D010656:Phenylephrine; C006104:U 0521; D003042:Cocaine; D007545:Isoproterenol; D002122:Calcium Chloride; D009638:Norepinephrine