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Ebstein Anomaly of the Tricuspid Valve with Intact Inter-atrial Septum and Cor Triatriatum Dexter in an Asymptomatic Adult: The Tri-chambered Right Atrium

Ebstein anomaly of the tricuspid valve is characterized by apical displacement of septal and posterior leaflets of the tricuspid valve leading to the atrialization of right ventricular cavity and severe low-pressure tricuspid regurgitation. Cor triatriatum dexter is a rare congenital cardiac anomaly in which a membranous structure divides the right atrium into two chambers. This combination is rare and very few cases have been described in the literature. We herein report an asymptomatic young female who was incidentally detected to have these anomalies with intact atrial septum. Echocardiographic examination showed tri-chambered right atrium consisting of atrialized right ventricle, anterior right atrial chamber, and the posterior right atrial sinus portion.