Concomitant axial cineangiography and barium esophagography in the evaluation of vascular rings.

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Abstract
Six vascular rings were evaluated using axial biplane cineangiography and concomitant Ba esophagography. Three patients had a double aortic arch, 2 had a right aortic arch and aberrant left subclavian artery with a foreshortened left ligamentum arteriosum, and 1 had a pulmonary vascular sling. Ba was administered in the esophagus of the anesthetized patient followed by cineangiography. Five patients were evaluated using the standard and 4-chamber projection. The 6th patient with the pulmonary sling was evaluated in the standard and sitting projection. With the 4-chamber view, vascular rings were exposed and atypical features such as a small right aortic arch component and branch stenoses of the brachiocephalic arteries were revealed. Axial views of an esophagogram allow easier morphologic analysis and more precise definition of the vascular abnormality than conventional views.