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(Circulation. 1950;1:294.)
© 1950 American Heart Association, Inc.

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Dilatation and Pulsation of the Left Subclavian Artery in the Roentgen-Ray Diagnosis of Coarctation of the Aorta

Roentgenkymographic Studies in Thirteen Cases

HERBERT M. STAUFFER M.D.¹ LEO G. RIGLER M.D.¹

¹ From the Department of Radiology and Physical Medicine, University of Minnesota Hospitals, Minneapolis, Minn.

Postero-anterior chest roentgenograms in 17 of 20 patients with coarctation of the aorta showed widening of the left upper mediastinal shadow attributed to dilatation of the left subclavian artery; pulsations of this vessel were evident in 12 of 13 cases with roentgenkymograms. In 3 of the latter cases rib notching was absent or equivocal. The subclavian pulsations may be observed fluoroscopically. Recognition of dilatation and pulsation of the left subclavian artery may provide roentgenologic corroboration of a diagnosis of coarctation of the aorta even in the absence of rib notching.