title: Contractile responses to morphine, piritramide, meperidine, and fentanyl: a comparative study of effects on the isolated ventricular myocardium.
mesh_terms: D000700:Analgesics / Q000494:pharmacology*; D000818:Animals; D001696:Biomechanical Phenomena / Q000187:drug effects; D002415:Cats; D004558:Electric Stimulation; D005283:Fentanyl / Q000008:administration & dosage / Q000494:pharmacology*; D006352:Heart Ventricles; D066298:In Vitro Techniques; D007540:Isonipecotic Acids / Q000494:pharmacology*; D008614:Meperidine / Q000008:administration & dosage / Q000494:pharmacology*; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology*; D009119:Muscle Contraction / Q000187:drug effects*; D009132:Muscles / Q000187:drug effects*; D009570:Nitriles / Q000494:pharmacology; D010210:Papillary Muscles; D010880:Piperidines / Q000494:pharmacology
chemical_list: D000700:Analgesics; D007540:Isonipecotic Acids; D009570:Nitriles; D010880:Piperidines; D009020:Morphine; D008614:Meperidine; D005283:Fentanyl