title: Dromotropic effects of optical isomers of beta blockers on the cross-circulated canine-atrioventricular node preparation.
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000494:pharmacology*; D000526:Alprenolol / Q000494:pharmacology; D000818:Animals; D004285:Dogs; D004305:Dose-Response Relationship, Drug; D004558:Electric Stimulation; D006329:Heart Conduction System / Q000187:drug effects*; D066298:In Vitro Techniques; D007536:Isomerism; D009638:Norepinephrine / Q000008:administration & dosage / Q000494:pharmacology; D010477:Perfusion; D011433:Propranolol / Q000494:pharmacology
chemical_list: D000319:Adrenergic beta-Antagonists; D000526:Alprenolol; D011433:Propranolol; D009638:Norepinephrine