In this procedure, the provider performs imaging supervision and interpretation for the repair of the descending thoracic aorta. He uses arteriography to visualize the inside of the blood vessels and to identify and repair an aneurysm, pseudoaneurysm, arteriovenous malformation, or trauma to the descending thoracic aorta by using an endoprosthesis. The provider places the endoprosthesis at the target site in the descending thoracic aorta covering the origin of the left subclavian artery. He may also extend the prosthesis to the level of the celiac artery origin. An aneurysm is a bulge in the blood vessel due to a weak area in the wall of the vessel.
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