title: Clinical, electrocardiographic, and electrophysiological observations of dual A-V nodal pathways.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001145:Arrhythmias, Cardiac / Q000175:diagnosis / Q000503:physiopathology*; D001283:Atrioventricular Node / Q000503:physiopathology*; D001285:Atropine / Q000494:pharmacology; D002648:Child; D004562:Electrocardiography; D006329:Heart Conduction System / Q000503:physiopathology*; D006801:Humans; D008875:Middle Aged; D012032:Refractory Period, Electrophysiological; D013614:Tachycardia, Paroxysmal / Q000503:physiopathology
chemical_list: D001285:Atropine