title: Familial sinuatrial disorder.
mesh_terms: D000293:Adolescent; D000328:Adult; D001146:Arrhythmia, Sinus / Q000150:complications / Q000175:diagnosis / Q000235:genetics*; D001285:Atropine; D002819:Chorea / Q000150:complications; D004562:Electrocardiography; D005260:Female; D006339:Heart Rate; D006801:Humans; D008297:Male; D008875:Middle Aged; D012213:Rheumatic Fever / Q000150:complications; D014630:Vagus Nerve / Q000502:physiology; D014636:Valsalva Maneuver
chemical_list: D001285:Atropine