[A morphological study of 23 hearts with Ebstein's anomaly].

The literature published of the Ebstein anomaly of the tricuspid valve have been given little attention to the study of the trabecular portion of the right ventricle. This motivate us to study the morphology of twenty-three hearts by the segmentary sequential method determining with special interest the extension and grade of valvular attachment, dysplasia, characteristics of the trabecular portion of the right ventricle and associated anomalies. The three valves had some grade of attachment but this was less frequently in the anterior valve. However in our material this occurred in 43% which is consider high comparing with the rest of the literature; the trabecular portion had several bands at this zone and it was covered by the valve attachment. The downward displacement of the functional ring was directly proportional to the valve attachment. The structural anomalies of the right ventricle related to the valve malformation lead us to consider that the primary damage that causes this cardiopathy occurred at the right ventricle during the embryonic development altering the morphogenesis of the tricuspid valve.