CTICasesInterrupted Aortic Arch
Imaging findings
Frontal chest radiograph demonstrates widening of the left paratracheal region and prominent rib notching. On cardiac catheterization and CT, there is a blind-ending descending thoracic aorta with massive collateral pathways, including highly dilated internal mammary arteries, intercostal collaterals, and prominent chest wall vessels.
Key takeaways
Interrupted aortic arch or extreme coarctation can present late in life with symptoms such as dyspnea on exertion and refractory hypertension. Key radiographic clues include prominent rib notching from dilated intercostal collaterals and widening of the left paratracheal stripe.
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