Maternal lithium and neonatal Ebstein's anomaly: evaluation with cross-sectional echocardiography.

Cross-sectional echocardiography was used to evaluate two neonates whose mothers ingested lithium during pregnancy. In one infant, Ebstein's anomaly of the tricuspid valve was identified. In the other infant cross-sectional echocardiography provided reassurance that the infant did not have Ebstein's anomaly. Cross-sectional echocardiographic screening of newborns exposed to lithium during gestation can provide highly accurate, noninvasive assessment of the presence or absence of lithium-induced cardiac malformations.