title: The primary pacemaker: functions, falterings, fate, and false alarms.
mesh_terms: D000293:Adolescent; D000328:Adult; D001146:Arrhythmia, Sinus / Q000175:diagnosis / Q000503:physiopathology; D016275:Atrial Function; D001341:Autonomic Nervous System / Q000502:physiology; D001919:Bradycardia / Q000209:etiology; D002648:Child; D004071:Digitalis Glycosides / Q000009:adverse effects; D006329:Heart Conduction System / Q000502:physiology; D006331:Heart Diseases / Q000209:etiology; D006801:Humans; D008297:Male; D008875:Middle Aged; D010138:Pacemaker, Artificial / Q000009:adverse effects; D012849:Sinoatrial Node / Q000502:physiology* / Q000503:physiopathology; D012850:Sinus of Valsalva / Q000502:physiology; D012893:Sleep Wake Disorders / Q000628:therapy; D013575:Syncope / Q000209:etiology; D013577:Syndrome
chemical_list: D004071:Digitalis Glycosides