title: Can sympathomimetic agents be classified by their action on the force-interval relationship?
mesh_terms: D000818:Animals; D004357:Drug Synergism; D007545:Isoproterenol / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D008729:Methoxamine / Q000494:pharmacology*; D009200:Myocardial Contraction / Q000187:drug effects*; D009638:Norepinephrine / Q000494:pharmacology*; D010646:Phentolamine / Q000494:pharmacology; D010656:Phenylephrine / Q000494:pharmacology*; D011217:Practolol / Q000494:pharmacology; D011433:Propranolol / Q000494:pharmacology; D011817:Rabbits
chemical_list: D010656:Phenylephrine; D011433:Propranolol; D008729:Methoxamine; D007545:Isoproterenol; D011217:Practolol; D009638:Norepinephrine; D010646:Phentolamine