PMC9810843_01
Surface shading reconstruction from CT angiogram. (A) Thoracic aortic aneurysms of the ascending and proximal descending thoracic aorta. (B) Repair with interposition graft to ascending aorta and proximally anastomosed bypass grafts to brachiocephalic, left common carotid, and left subclavian arteries. Remnant stumps of tied-off great vessels are seen on the superior border of the aortic arch. The proximal and distal suture lines of the interposition graft are seen with a neo-proximal landing zone created for completion of TEVAR. (C) Post-TEVAR CT angiogram with successful exclusion of aortic aneurysm and patent bypass grafts
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A 56-year-old female patient who presented with expanding distal aortic arch and proximal descending thoracic aorta (6 cm in diameter) following conservative management of type B aortic dissection with thrombosed false lumen (Figure 1A).
Angiography in steep LAO pre- and post-TEVAR. Pre-graft implantation shows no suitable native landing zone, but suitable seal zone within the ascending graft. Completion angiography shows successful exclusion of the proximal descending thoracic aortic aneurysm with patent bypass grafts
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Angiography demonstrated the neo-landing zone within the graft (Figure 2). Angiography confirmed exclusion of false lumen with widely patent true lumen, bypass grafts, and visceral vessels (Figure 2).
PMC9810843_02
CT aortic angiogram. (A) Type B aortic dissection extending to the aortic bifurcation; additional retrograde extension with intramural hematoma extending to the aortic valve; absence of genuine proximal landing zone for TEVAR; evidence of end-organ ischemia with shotgun right renal artery and delayed right nephrogram in the context of deteriorating renal function. (B) Surface shading reconstruction after surgical procedure with creation of a suitable landing zone for TEVAR and persistent dissection beyond the distal anastomosis. (C) Surface shading reconstruction 1-year post-intervention with widely patent true lumen and bypass grafts; total aortic remodeling and complete obliteration of the false lumen
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Imaging investigation showed the presence of an intramural hematoma in the distal aortic arch and a type B aortic dissection (Figure 3A).
(A) Angiography demonstrates suitable proximal landing zone in the ascending aortic interposition graft with patent bypass grafts. Gore cTAG thoracic graft partially deployed with 100% angulation applied to maximize inner curve wall apposition to prevent "bird-beaking." (B) CO2 angiography to minimize nephrotoxic iodinated contrast shows implanted Cook Zenith dissection stent through the abdominal aorta (PETTICOAT technique), but with compression in the true lumen and persistent flow in the false lumen. Middle fluoroscopic grab image shows molding balloon dilatation of true lumen (STABILIZE technique). Final angiogram shows widely patent true lumen and visceral vessels with obliteration of false lumen
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Angiography confirmed exclusion of false lumen with widely patent true lumen, bypass grafts, and visceral vessels (Figure 4).
PMC9810843_03
CT aortic angiogram. (A) Type B aortic dissection with the entry tear at the level of the left subclavian artery and concurrent ascending aortic aneurysm; (B) surface shading reconstruction following surgery
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Imaging investigation revealed the presence of non-A non-B distal aortic arch dissection with large entry tear and compression of the true lumen, dilatation of the aortic root (4.2 cm in diameter) and the ascending aorta (5 cm in diameter), and bovine aortic arch anatomy with separate origin of the left vertebral artery (Figure 5).
PMC9810843_04
CT aortic angiogram showing frontal (A), transverse (B), and longitudinal (C) views of the expanding lesion
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A 55-year-old male patient was referred to our unit for expanding false lumen in the aortic arch following repair of type A aortic dissection with interposition Dacron graft to the ascending aorta 7 months earlier in a different hospital (Figure 6).
(A) Postoperative CT aortic angiogram showing the position of the stent in the proximal descending thoracic aorta. (B) Surface shading reconstruction of CT angiogram with emphasis on the graft from the left subclavian sutured to the branch of the ascending aortic graft. (C) Further 3D reconstructed view showing a more complete overview of the anatomical relationships
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The postoperative CT-scan showed persistent satisfactory outcome of the TEVAR procedure (Figure 7).