title: The isolated perfused heart preparation: two suggested improvements.
mesh_terms: D000818:Animals; D006321:Heart / Q000187:drug effects; D006339:Heart Rate; D006352:Heart Ventricles; D066298:In Vitro Techniques; D008722:Methods; D009119:Muscle Contraction; D009638:Norepinephrine; D010477:Perfusion; D051381:Rats
chemical_list: D009638:Norepinephrine