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QT interval prolongation in asymptomatic anti-SSA/Ro-positive infants without congenital heart block

R Cimaz1, M Stramba-Badiale, A Brucato

  • 1Instituti Clinici di Perfezionamento, Milan, Italy.

Arthritis and Rheumatism
|May 19, 2000
PubMed

Insights

Infants born to mothers with anti-SSA/Ro antibodies may experience QT interval prolongation. Electrocardiogram (EKG) monitoring is recommended for these newborns to detect potential cardiac issues.

Area of Science:

  • Cardiology
  • Immunology
  • Neonatology

Background:

  • Maternal autoantibodies, specifically anti-SSA/Ro, can cross the placenta.
  • Potential cardiac effects of these antibodies on newborns are not fully understood.

Observation:

  • Electrocardiograms (EKGs) were analyzed in infants born to mothers with and without anti-SSA/Ro antibodies.
  • QT interval, a measure of cardiac repolarization, was assessed and corrected for heart rate (QTc).

Findings:

  • Infants with maternal anti-SSA/Ro antibodies exhibited significantly prolonged QTc intervals compared to controls.
  • A notable proportion of anti-SSA/Ro-positive infants had QTc values exceeding the normal range, confirmed by Holter monitoring.
  • QT prolongation suggests potential cardiac electrical abnormalities in these infants.

Implications:

  • Neonates exposed to maternal anti-SSA/Ro antibodies require vigilant EKG surveillance.
  • Early detection of QT prolongation can guide preventative management, such as beta-blocker therapy, to mitigate arrhythmia risks.
Abstract

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