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(Circulation. 1971;44:746.)
© 1971 American Heart Association, Inc.

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Hypoplasia of the Inflow Portion of the Right Ventricle: An Angiocardiographic Sign of Tricuspid Atresia

MURRAY G. BARON M.D.¹

¹ From the Department of Radiology, The Mount Sinai Hospital and the Mount Sinai School of Medicine of the City University of New York, New York, New York.

Atresia of the tricuspid valve is constantly associated with a large interatrial communication and an underdeveloped right ventricle. The ventricle adjacent to the right atrium is usually represented by a solid mass of myocardium without a lumen and, therefore, remain unopacified on an angiocardiogram. The resulting triangular lucency between the contrast-filled right atrium and left ventricle is the angiocardiographic hallmark of tricuspid atresia.

Key Words: Atrial shunt • Congenital hypoplasia