title: Spontaneous Remission of Congenital Complete Atrioventricular Block in Anti-Ro/La Antibody-Negative Monozygotic Twins: Case Report.
abstract: Congenital complete atrioventricular block without any structural heart disease and anti-Ro/La negativity is very rare. Discordant complete atrioventricular block, which is more frequently defined in the literature as an autoimmune mechanism, is much more rare in monozygotic twins.
  
  
  
  The 26-year-old healthy mother had given birth in her first spontaneous, uneventful pregnancy to monozygotic twins at week 35. While the first twin's physical examination proved her to be normal with a pulse rate consistent with her age, the second twin had a pulse rate of approximately 40 beats/minute.The patient was confirmed to have congenital complete atrioventricular block.
  
  
  
  Despite this case appears to be an isolated one, a discordant complete atrioventricular block regression without any autoimmune evidence should be included in the differential diagnosis of bradycardia in infants.
authors.affiliation: Department of Pediatric Cardiology, İstanbul Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Center and Research Hospital, İstanbul, Turkey.
authors.forename: Taner
authors.initials: T
authors.lastname: Kasar
authors.affiliation: Department of Pediatric Cardiology, İstanbul Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Center and Research Hospital, İstanbul, Turkey.
authors.forename: Murat
authors.initials: M
authors.lastname: Saygı
authors.affiliation: Department of Pediatric Cardiology, İstanbul Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Center and Research Hospital, İstanbul, Turkey.
authors.forename: İsa
authors.initials: İ
authors.lastname: Özyılmaz
authors.affiliation: Department of Pediatric Cardiology, İstanbul Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Center and Research Hospital, İstanbul, Turkey.
authors.forename: Yakup
authors.initials: Y
authors.lastname: Ergül
mesh_terms: D000974:Antibodies, Antinuclear / Q000032:analysis / Q000097:blood; D054537:Atrioventricular Block / Q000151:congenital* / Q000235:genetics; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D012075:Remission, Spontaneous; D014430:Twins, Monozygotic / Q000235:genetics*
chemical_list: D000974:Antibodies, Antinuclear; C035356:SS-A antibodies
keywords: Anti-Ro/La antibody; congenital heart block; discordant complete atrioventricular block; infants