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(Circulation. 1967;35:389.)
© 1967 American Heart Association, Inc.

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Anomalous Mitral Arcade

A Type of Congenital Mitral Insufficiency

THOMAS E. LAYMAN M.D.¹ JESSE E. EDWARDS M.D.¹

¹ From the Departments of Medicine and Pathology, University of Minnesota, Minneapolis, Minnesota, and the Department of Pathology, The Charles T. Miller Hospital, St. Paul, Minnesota.

Described in three infants is an anomaly of the mitral valvular mechanism which has the following characteristic: connection of the left ventricular papillary muscles to the anterior mitral leaflet, either directly or through the interposition of unusually short chordae. The condition has been named "anomalous mitral arcade." The anatomic aberration appears to cause incompetence of the mitral valve.

Key Words: Cardiac development • Chordae tendineae • Papillary muscles

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