Is Ebstein's anomaly a genetic disease?

Ebstein's anomaly is

a rare congenital heart disease. The etiology of the disease has not been clarified yet. It is considered to be related to gene mutation. Some people think that the occurrence of the disease is related to the use of lithium in the process of pregnancy. In addition, long-term exposure to radioactive materials or viral infection in early pregnancy will lead to an increased incidence of Ebstein's anomaly. However, there is no definite clinical study that indicates that the disease is a genetic disease.