Congenital complete atrioventricular block: asymptomatic at 38 years.

Congenital complete atrioventricular block is quite rare, with usually a benign clinical evolution. However, because the first manifestation can be sudden death, it is important to evaluate patients and to establish clear prognostic criteria. A case of complete congenital atrioventricular block in a 38-year-old woman is presented to illustrate these criteria.