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Transesophageal Echocardiographic Study of Ebstein's Anomaly

Twenty‐four adults with Ebstein's anomaly were studied using transesophageal echocardiography (TEE) with color Doppler. Transesophageal and transgastric images in transverse and longitudinal planes made it possible to study wall attachments and anomalous insertions of the three tricuspid leaflets. Transesophageal imaging allows estimation of functional and atrialized right venticle as well as wall thickness and mobility. A semiquantitative estimate of tricuspid regurgitation and identification of associated flow defects were performed with color‐coded Doppler. In 22 of the 24 patients, interatrial shunts were documented; there were three cases with a ventricular septal defect and in three cases, mild hypoplasia of the right ventricular outflow tract; one with hypoplasia of the pulmonary artery. One patient had an associated patent ductus arteriosus. It is concluded that TEE with a biplanar probe provides information that complements that of transthoracic studies in the diagnostic evaluation of patients with Ebstein's anomaly.