Leeds Fetal Medicine Unit Website

Ebstein's Anomaly

Definition	Tricuspid dysplasia with abnormalities of right ventricle
Incidence	0.05/1000
Diagnosis	Ultrasound
Gestation at diagnosis	18-22 weeks
Known chromosomal or genetic association	Yes, Trisomy 18, 21. Previous association with lithium exposure not now thought to be proven
Further investigations	Karyotype and Fetal Echocardiogram
Differential Diaganosis	Pulmonary Atresia AVSD
Prognosis	If heart size does not cause hydrops or pulmonary hypoplasia during pregnancy prognosis is good with mortality <10%
Recurrance risk	1%
Research Studies	None

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