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Uptodate Reference Title
Aortogram coarctation showing aorta "3" sign
Aortogram coarctation showing aorta "3" sign
The aortogram shows the "3" sign consisting of the enlarged and distorted aortic knob and subclavian artery forming the upper portion of the 3, the waist at the site of the coarctation (arrow), and the lower portion formed by the post stenotic dilatation of the proximal descending aorta.