title: Evaluation of the pre-ejection period as an estimate of myocardial contractility in dogs.
mesh_terms: D000818:Animals; D001011:Aorta; D001285:Atropine / Q000494:pharmacology; D001794:Blood Pressure / Q000187:drug effects; D004285:Dogs; D004562:Electrocardiography; D006321:Heart / Q000502:physiology*; D006339:Heart Rate; D006352:Heart Ventricles; D006584:Hexamethonium Compounds / Q000494:pharmacology; D009119:Muscle Contraction; D010701:Phonocardiography; D011433:Propranolol / Q000494:pharmacology
chemical_list: D006584:Hexamethonium Compounds; D001285:Atropine; D011433:Propranolol