title: The effect of  -adrenergic blockade on cardiac responses to orthostatic stress.
mesh_terms: D000319:Adrenergic beta-Antagonists / Q000494:pharmacology; D000328:Adult; D000526:Alprenolol / Q000494:pharmacology; D000605:Amino Alcohols / Q000494:pharmacology*; D002302:Cardiac Output / Q000187:drug effects; D002986:Clinical Trials as Topic; D006321:Heart / Q000187:drug effects* / Q000503:physiopathology; D006339:Heart Rate / Q000187:drug effects; D006801:Humans; D008297:Male; D010919:Placebos; D011187:Posture; D013312:Stress, Physiological / Q000503:physiopathology*; D013565:Sympatholytics / Q000494:pharmacology*
chemical_list: D000319:Adrenergic beta-Antagonists; D000605:Amino Alcohols; D010919:Placebos; D013565:Sympatholytics; D000526:Alprenolol