title: Estimation and quantification of myocardial contractility in the closed-chest dog.
mesh_terms: D000804:Angiotensin II / Q000494:pharmacology; D000818:Animals; D001795:Blood Pressure Determination; D004285:Dogs; D004562:Electrocardiography; D006321:Heart / Q000502:physiology*; D009119:Muscle Contraction / Q000187:drug effects; D010701:Phonocardiography; D011433:Propranolol / Q000494:pharmacology; D013565:Sympatholytics / Q000494:pharmacology; D016276:Ventricular Function
chemical_list: D013565:Sympatholytics; D000804:Angiotensin II; D011433:Propranolol