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Clinical, Microbiologic, and Outcome Analysis of Mycotic Aortic Aneurysm: The Role of Endovascular Repair.

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Clinical, Microbiologic, and Outcome Analysis of Mycotic Aortic Aneurysm: The Role of Endovascular Repair.

Surg Infect (Larchmt). 2014 May 6;

Authors: Huang YK, Chen CL, Lu MS, Tsai FC, Lin PL, Wu CH, Chiu CH

Abstract
Abstract Background: Mycotic aortic aneurysm (MAA) is an infrequent but devastating form of vascular disease. Methods: We conducted a retrospective cohort study at a major medical center to identify independent risk factors for MAA and to provide opinions about treating it. The study population consisted of 43 patients who had had 44 MAAs over a period of 15?y. Results: All of the patients had positive blood cultures, radiologic findings typical of MAA, and clinical signs of infection (leukocytosis, fever, and elevated C-reactive protein). The mean age of the patients was 63.8±10.6?y and the mean period of their follow up was 35.7±39.3?mo. Twenty-nine patients with MAAs underwent traditional open surgery, 11 others received endovascular stent grafts, and four MAAs were managed conservatively. The most frequent causative pathogens were Salmonella (36/44 patients [81.8%]), in whom organisms of Salmonella serogroup C (consisting mainly of S. choleraesuis) were identified in 14 patients, organisms of Salmonella serogroup D were identified in 13 patients, and species without serogroup information were identified in nine patients. The overall mortality in the study population was 43.2% (with an aneurysm-related mortality of 18.2%, surgically related mortality of 13.6%, and in-hospital mortality of 22.7%). Conclusions: Shock is a risk factor for operative mortality. Misdiagnosis and treatment of MAA as low back pain, co-existing connective-tissue disease such as systemic lupus erythematosus and rheumatoid arthritis, and Salmonella serogroup C-associated bacteremia are risk factors for aneurysm-related death. Endovascular repair should be considered as an alternative option to the open repair of MAA.

PMID: 24800865 [PubMed – as supplied by publisher]

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