[Pregnancy and delivery in a mother with Ebstein's anomaly].

Ebstein's anomaly is characterized by abnormalities both in the basal and in the free attachments of the leaflets of the tricuspid valve. Fairly frequently the developmental defect is associated with a WPW syndrome (Type B). The main obstetric problems arise from tachyarrhythmias. Since tachycardias in these patients are due to physical stress, correct planning of delivery calls for lightening of the hemodynamic burden of labor, careful analysis of the cardiac status, meticulous preparation for optimum antiarrhythmic therapy and correct timing for induction of labor. The case of a young primipara with Ebstein's anomaly is presented to typify the need for cooperation of subspecialities.