Fetal echocardiographic signs of congenital endocardial fibroelastosis.

Endocardial fibroelastosis is characterized by a porcelain-like thickening of the endocardium, resulting in a marked increase in echodensity of the endocardium, as well as ventricular dilatation and aortic atresia. With improvement in prenatal ultrasound, this condition can be suspected in utero on the basis of ventricular enlargement, poor ventricular contractility, and marked echodensity of the endocardial surface. We present two cases in which such conditions were found on prenatal M-mode echocardiography and two-dimensional directed pulsed Doppler. Ventriculomegaly and hypocontractility of the ventricle are, however, nonspecific for such conditions; the diagnosis can be made accurately only by pathology. When such findings appear on ultrasound, all efforts should be made to deliver the patient in a perinatal center for optimal neonatal surgery to improve the survival of the newborn.