title: Effects of beta-adrenergic blockade on the systolic time intervals.
mesh_terms: D000083:Acetanilides; D000293:Adolescent; D000319:Adrenergic beta-Antagonists / Q000494:pharmacology; D000328:Adult; D002339:Carotid Arteries / Q000502:physiology; D004562:Electrocardiography; D006339:Heart Rate / Q000187:drug effects*; D006801:Humans; D007545:Isoproterenol / Q000037:antagonists & inhibitors / Q000494:pharmacology; D008297:Male; D009119:Muscle Contraction / Q000187:drug effects; D010701:Phonocardiography; D011433:Propranolol / Q000494:pharmacology*; D011674:Pulse; D013565:Sympatholytics / Q000494:pharmacology*; D013997:Time Factors; D016276:Ventricular Function
chemical_list: D000083:Acetanilides; D000319:Adrenergic beta-Antagonists; D013565:Sympatholytics; D011433:Propranolol; D007545:Isoproterenol