RESUMEN
BACKGROUND: Fetal echocardiography is possible to confirm with great certainty the diagnosis, in utero, Ebstein's anomaly, as well as determine its perinatal prognosis. OBJECTIVE: Review the experience of 16 cases diagnosed with Ebstein's anomaly, using fetal echocardiography, analyzing "forecast echocardiographic parameters" set by Pavlova, Huhta and Barre. MATERIAL AND METHOD: retrospective and descriptive analysis. We analysed echocardiographic parameters and its correlation with the perinatal development of 16 cases diagnosed with Ebstein's anomaly. RESULTS: Maternal age of our patients was 27.94 +/- 5.7 years, gestational age 31.3 +/- 3.6.) Mortality: in-utero 37.5% (n = 6), neonatal 50% (n = 8), survived 12.5% (n = 2). Cardiothoracic index 0.61 +/- 0.074, relationship foramen oval/heart atrial 0.6 +/- 0.015; obstruction to the way out of the right ventricle in 14 cases (87.5%). The deceased 81% presented degree of valvular displacement > 2.5; relationship RV/LV 2.24 +/- 0.37). CONCLUSIONS: Cardiothoracic index fetal stage > 0.55, relationship oval foramen/interatrial septum < 0.3, obstruction to the way out and a degree of valvular displacement > 2.5, absence of back flow in arteriosus ductus and a ratio RV/LV > 2 are poor prognostic factors for Ebstein's anomaly.