title: Influence of heart rate on left ventricular ejection fraction in human beings.
mesh_terms: D000293:Adolescent; D000328:Adult; D006339:Heart Rate; D006352:Heart Ventricles / Q000503:physiopathology; D006801:Humans; D008875:Middle Aged; D009068:Movement; D011433:Propranolol / Q000494:pharmacology; D013997:Time Factors
chemical_list: D011433:Propranolol