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We report a case of congenital complete heart block (CCHB). A 38-year-old woman was admitted our hospital because of fetal bradycardia at 21 weeks 3 days of gestational age. She had no symptom of collagen disease. On admission, laboratory data showed positive anti-nuclear antibodies, anti-SS-A/Ro antibodies and anti-52 kD SS-A/Ro antibodies. But anti-60 kD SS-A/Ro and anti-SS-B/La antibodies were negative. Consequently anti-52 kD SS-A/Ro antibodies positive woman had an infant with CCHB. The baby was equipped with pacemaker at the age of 2 months. This report suggests that anti-52 kD SS-A/Ro antibodies may play an important role in the development of CCHB.

A Case of Congenital Complete Heart Block in a Mother with anti-52kD SS-A/Ro antibodies.