Diseases and Conditions

Ebstein anomaly

Risk factors

Congenital heart defects, such as Ebstein anomaly, occur as the baby's heart develops in the mother's womb.

Doctors aren't sure what risk factors are associated with the defect. Genetic and environmental factors are believed to play a role. A family history of heart defects or a mother's use of certain medications, such as lithium, during pregnancy might increase the risk of Ebstein anomaly in the child.