title: Autonomic effects on the human cardiac conduction system. Evaluation by intracardiac electrocardiography and programmed stimulation techniques.
mesh_terms: D000328:Adult; D000368:Aged; D001285:Atropine / Q000494:pharmacology; D001341:Autonomic Nervous System / Q000187:drug effects / Q000502:physiology*; D004558:Electric Stimulation / Q000379:methods; D004562:Electrocardiography / Q000379:methods; D005260:Female; D006329:Heart Conduction System / Q000502:physiology*; D006801:Humans; D008297:Male; D008875:Middle Aged; D011433:Propranolol / Q000494:pharmacology; D012849:Sinoatrial Node / Q000502:physiology
chemical_list: D001285:Atropine; D011433:Propranolol