Rheumatology Advance Access originally published online on February 3, 2005
Rheumatology 2005 44(5):691-693; doi:10.1093/rheumatology/keh556
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© The Author 2005. Published by Oxford University Press on behalf of the British Society for Rheumatology. All rights reserved. For Permissions, please email: journals.permissions@oupjournals.org
LETTER TO THE EDITOR |
Congenital heart block associated with a maternal anti-HsEg5-like autoantibody
Departments of Immunology, 1 Pediatrics and 2 Obstetrics and Gynecology, University of Rostock, Rostock, Germany
Correspondence to: R. Claus, Institute of Immunology, University of Rostock, Schillingallee 70, 18057 Rostock, Germany. E-mail: renate.claus@med.uni-rostock.de
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SIR, Congenital heart block (CHB) is a rare (1:20 000) disease, and in 70% of cases there are no coexisting cardiac malformations [1]. In this subsect, up to 90% [2, 3] are associated with, if not directly caused by, maternal autoantibodies (Abs) against SSA/SSB (cardiac manifestation of neonatal lupus erythematosus), independently of whether maternal SLE or SS is manifested. Via active placental transfer (increasing after 16 weeks' gestation), IgG antibodies (Abs) gain access to the fetal heart during a vulnerable phase (from week 16 until shortly after birth), when the main cardiac development is complete and physiological apoptotic events prevail. Damage to