title: Observation on the effect of digitalis on sinus node function by recording of twenty-four hour continuous electrocardiogram.
mesh_terms: D000328:Adult; D000368:Aged; D001281:Atrial Fibrillation / Q000188:drug therapy* / Q000503:physiopathology; D002940:Circadian Rhythm; D004074:Digitoxin / Q000008:administration & dosage / Q000009:adverse effects* / Q000627:therapeutic use; D004562:Electrocardiography; D006801:Humans; D008297:Male; D008875:Middle Aged; D012849:Sinoatrial Node / Q000187:drug effects* / Q000503:physiopathology; D013614:Tachycardia, Paroxysmal / Q000188:drug therapy* / Q000503:physiopathology
chemical_list: D004074:Digitoxin