title: Electrocardiographic abnormalities in infants born from mothers with autoimmune diseases--a multicentre prospective study.
abstract: OBJECTIVE
  To assess the prevalence of congenital heart block (CHB) and electrocardiographic (ECG) abnormalities in infants of anti-Ro/SSA-positive women.
  
  
  METHODS
  Sixty anti-Ro-positive and 36 anti-Ro-negative patients were prospectively followed before/during pregnancy and underwent weekly fetal echocardiography from 18th to 26th weeks of gestational age. Infants' ECG and/or ECG-Holter were performed at 1, 3, 6 and 12 months. ECG of 200 consecutive neonates were used as a healthy control group.
  
  
  RESULTS
  One of 61 fetuses of anti-Ro-positive mothers developed CHB (20th week); another anti-Ro-positive baby developed second degree atrioventricular (AV) block (30th week). The prevalence of transient first degree AV block detected post-natally was significantly higher in the anti-Ro-positive group, in comparison with healthy controls (P = 0.002). No differences in corrected QT (QTc) interval prolongation prevalence (>/=440 ms) was observed between the anti-Ro-positive and -negative groups, but both were significantly higher than that of the control population (P < 0.001). ECG-Holter showed QTc prolongation in 59% of infants of anti-Ro-positive and in 60% of infants of anti-Ro-negative mothers. Holter QTc was >/=470 ms in four infants of anti-Ro-positive group and two of anti-Ro-negative group. Known acquired causes of QTc prolongation were excluded.
  
  
  CONCLUSIONS
  This prospective study confirms the low occurrence of CHB in newborns from anti-Ro-positive mothers. ECG abnormalities (first degree AV block and QTc interval prolongation) are frequent in infants of mothers with autoimmune diseases, independently of maternal disease, autoantibody profile and treatment during pregnancy.
authors: Allergy, Clinical Immunology & Rheumatology Unit, IRCCS Istituto Auxologico Italiano, Via Spagnoletto, 3, 20149 Milan, Italy.
authors: M
authors: M
authors: Gerosa
authors: R
authors: R
authors: Cimaz
authors: M
authors: M
authors: Stramba-Badiale
authors: K
authors: K
authors: Goulene
authors: E
authors: E
authors: Meregalli
authors: L
authors: L
authors: Trespidi
authors: B
authors: B
authors: Acaia
authors: R
authors: R
authors: Cattaneo
authors: A
authors: A
authors: Tincani
authors: M
authors: M
authors: Motta
authors: A
authors: A
authors: Doria
authors: F
authors: F
authors: Zulian
authors: O
authors: O
authors: Milanesi
authors: A
authors: A
authors: Brucato
authors: P
authors: P
authors: Riboldi
authors: P L
authors: PL
authors: Meroni
mesh_terms: D000974:Antibodies, Antinuclear / Q000097:blood; D001327:Autoimmune Diseases / Q000276:immunology*; D004562:Electrocardiography; D015716:Electrocardiography, Ambulatory; D005260:Female; D005500:Follow-Up Studies; D006327:Heart Block / Q000151:congenital* / Q000276:immunology; D006801:Humans; D007231:Infant, Newborn; D008133:Long QT Syndrome / Q000276:immunology; D011247:Pregnancy; D011248:Pregnancy Complications / Q000276:immunology*; D011256:Pregnancy Outcome; D011297:Prenatal Exposure Delayed Effects; D011446:Prospective Studies
chemical_list: D000974:Antibodies, Antinuclear; C035356:SS-A antibodies