title: Autonomic tone of patients during an electrophysiological catheterization. The role of autonomic influences on the reproducibility of sinus node function studies.
mesh_terms: D000328:Adult; D001341:Autonomic Nervous System / Q000502:physiology*; D006328:Cardiac Catheterization; D002395:Catecholamines / Q000652:urine; D004594:Electrophysiology; D005260:Female; D006329:Heart Conduction System / Q000502:physiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D012849:Sinoatrial Node / Q000502:physiology; D013599:Systole; D013997:Time Factors
chemical_list: D002395:Catecholamines