Evaluation of Aortic Zone 2 Proximal Landing Accuracy During Thoracic Endovascular Aortic Repair Following Carotid-Subclavian Revascularization. 2021

Sally H J Choi, and Gary K Yang, and Keith Baxter, and Joel Gagnon
Division of Vascular Surgery, University of British Columbia, Vancouver, British Columbia, Canada.

BACKGROUND Adequate seal for thoracic endovascular aortic repair (TEVAR) commonly requires landing in zone 2, but can prove to be challenging due to the tortuous and angulated anatomy of the region. OBJECTIVE Our objective was to determine the proximal landing accuracy of zone 2-targeted TEVARs following carotid-subclavian revascularization (CSR) and its impact on clinical outcomes. METHODS Retrospective review of patients that underwent CSR for zone 2 endograft delivery at a tertiary institute between January 2008 and March 2018 was conducted. Technical outcomes were assessed by examining the incidence of intraoperative corrective maneuvers, 1a endoleaks and reinterventions. Distance to target and incidence of LSA stump filling were examined as radiographic markers of landing accuracy. RESULTS Zone 2-targeted TEVAR with CSR was performed in 53 patients for treatment of dissections (49%), aneurysms (30%) or trauma (21%). Nine (17%) cases required intraoperative corrective procedures: 5 (9%) proximal cuffs due to type 1a endoleak and 4 (8%) left common carotid artery (LCCA) stenting due to inadvertent coverage. Cases performed using higher resolution hybrid fluoroscopy machine compared to mobile C-arm were associated with increased proximal cuff use (OR 8.8; 95% CI 1.2-62.4). Average distance between the proximal edge of the covered graft to LCCA was 8 ± 1 mm and larger distances were not associated with higher rates of 1a endoleak. Twenty-eight (53%) cases of antegrade LSA stump filling were noted on follow-up imaging, but were not associated with higher rates of reinterventions (OR 0.8, 95% CI [0.2-4.6]). Three (6%) patients had a stroke within 30 days and 4 (8%) patients expired within 1 month. Intraoperative corrective maneuvers, post-operative 1a endoleak and reinterventions were not associated with higher rates of stroke or mortality. CONCLUSIONS Using current endografts and imaging modalities, zone 2-targeted TEVARs have suboptimal technical accuracy.

UI MeSH Term Description Entries
D008297 Male Males
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D001807 Blood Vessel Prosthesis Device constructed of either synthetic or biological material that is used for the repair of injured or diseased blood vessels. Vascular Prosthesis,Blood Vessel Prostheses,Tissue-Engineered Vascular Graft,Graft, Tissue-Engineered Vascular,Grafts, Tissue-Engineered Vascular,Prostheses, Blood Vessel,Prostheses, Vascular,Prosthesis, Blood Vessel,Prosthesis, Vascular,Tissue Engineered Vascular Graft,Tissue-Engineered Vascular Grafts,Vascular Graft, Tissue-Engineered,Vascular Grafts, Tissue-Engineered,Vascular Prostheses,Vessel Prostheses, Blood,Vessel Prosthesis, Blood
D002339 Carotid Arteries Either of the two principal arteries on both sides of the neck that supply blood to the head and neck; each divides into two branches, the internal carotid artery and the external carotid artery. Arteries, Carotid,Artery, Carotid,Carotid Artery
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000368 Aged A person 65 years of age or older. For a person older than 79 years, AGED, 80 AND OVER is available. Elderly
D000784 Aortic Dissection A tear in the inner layer of the AORTA leading to interstitial HEMORRHAGE, and splitting (dissecting) of the aortic TUNICA MEDIA layer. It typically begins with a tear in the TUNICA INTIMA layer. Aneurysm, Dissecting,Aortic Dissecting Aneurysm,Dissecting Aneurysm,Dissecting Aneurysm Aorta,Aneurysm Aorta, Dissecting,Aneurysm, Aortic Dissecting,Aorta, Dissecting Aneurysm,Aortic Dissecting Aneurysms,Aortic Dissections,Dissecting Aneurysm Aortas,Dissecting Aneurysm, Aortic,Dissecting Aneurysms,Dissection, Aortic
D001013 Aorta, Thoracic The portion of the descending aorta proceeding from the arch of the aorta and extending to the DIAPHRAGM, eventually connecting to the ABDOMINAL AORTA. Aorta, Ascending,Aorta, Descending,Aortic Arch,Aortic Root,Arch of the Aorta,Descending Aorta,Sinotubular Junction,Ascending Aorta,Thoracic Aorta,Aortic Roots,Arch, Aortic,Ascending Aortas,Junction, Sinotubular,Root, Aortic,Sinotubular Junctions
D012189 Retrospective Studies Studies used to test etiologic hypotheses in which inferences about an exposure to putative causal factors are derived from data relating to characteristics of persons under study or to events or experiences in their past. The essential feature is that some of the persons under study have the disease or outcome of interest and their characteristics are compared with those of unaffected persons. Retrospective Study,Studies, Retrospective,Study, Retrospective

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