title: Myocardial depression by fentanyl and morphine.
mesh_terms: D000818:Animals; D002415:Cats; D004305:Dose-Response Relationship, Drug; D005283:Fentanyl / Q000494:pharmacology*; D006321:Heart / Q000187:drug effects*; D008722:Methods; D009020:Morphine / Q000494:pharmacology*; D012106:Research
chemical_list: D009020:Morphine; D005283:Fentanyl