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Made available in DSpace on 2022-04-28T19:47:00Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-10-01 Introduction: Aortic graft infection remains a considerable clinical challenge, and it is unclear which variables are associated with adverse outcomes among patients undergoing partial resection. Methods: A retrospective, multi-institutional study of patients who underwent partial resection of infected aortic grafts from 2002 to 2014 was performed using a standard database. Baseline demographics, comorbidities, operative, and postoperative variables were recorded. The primary outcome was mortality. Descriptive statistics, Kaplan-Meier (KM) survival analysis, and Cox regression analysis were performed. Results: One hundred fourteen patients at 22 medical centers in 6 countries underwent partial resection of an infected aortic graft. Seventy percent were men with median age 70 years. Ninety-seven percent had a history of open aortic bypass graft: 88 (77%) patients had infected aortobifemoral bypass, 18 (16%) had infected aortobiiliac bypass, and 1 (0.8%) had an infected thoracic graft. Infection was diagnosed at a median 4.3 years post-implant. All patients underwent partial resection followed by either extra-anatomic (47%) or in situ (53%) vascular reconstruction. Median follow-up period was 17 months (IQR 1, 50 months). Thirty-day mortality was 17.5%. The KM-estimated median survival from time of partial resection was 3.6 years. There was no significant survival difference between those undergoing in situ reconstruction or extra-anatomic bypass (P = 0.6). During follow up, 72% of repairs remained patent and 11% of patients underwent major amputation. On univariate Cox regression analysis, Candida infection was associated with increased risk of mortality (HR 2.4; P = 0.01) as well as aortoenteric fistula (HR 1.9, P = 0.03). Resection of a single graft limb only to resection of abdominal (graft main body) infection was associated with decreased risk of mortality (HR 0.57, P = 0.04), as well as those with American Society of Anesthesiologists classification less than 3 (HR 0.35, P = 0.04). Multivariate analysis did not reveal any factors significantly associated with mortality. Persistent early infection was noted in 26% of patients within 30 days postoperatively, and 39% of patients were found to have any post-repair infection during the follow-up period. Two patients (1.8%) were found to have a late reinfection without early persistent postoperative infection. Patients with any post-repair infection were older (67 vs. 60 years, P = 0.01) and less likely to have patent repairs during follow up (59% vs. 32%, P = 0.01). Patients with aortoenteric fistula had a higher rate of any post-repair infection (63% vs. 29%, P < 0.01) Conclusion: This large multi-center study suggests that patients who have undergone partial resection of infected aortic grafts may be at high risk of death or post-repair infection, especially older patients with abdominal infection not isolated to a single graft limb, or with Candida infection or aortoenteric fistula. Late reinfection correlated strongly with early persistent postoperative infection, raising concern for occult retained infected graft material. University Hospitals Cleveland Medical Center Case Western Reserve University School of Medicine the Ronald Reagan UCLA Medical Center University of California Los Angeles SSM Healthcare Semmelweis University Keck School of Medicine University of Southern California University of North Carolina School of Medicine University of Arizona the Indiana University Health Physicians Vascular Surgery Michigan Medicine University of Michigan University Heart Center Hamburg University Medical Center Hamburg-Eppendorf Penn State Heart and Vascular Institute Milton S. Hershey Medical Center Johns Hopkins Hospital The Heart Hospital Baylor Plano the Cardiovascular Surgery Clinic University of Messina National & Kapodistrian University of Athens University of Patras Keio University University of Pennsylvania Vancouver General Hospital & University of British Columbia Mayo Clinic Christiana Health System University of Chicago Harborview Medical Center University of Washington Washington University Stanford University CHU de Poitiers Baylor College of Medicine MedStar Georgetown University Hospital SSM Health St. Louis University Faculdade de Medicina de Botucatu-Unesp Beth Israel Deaconness Medical Center Brigham and Women's Hospital St. Joseph's Hospital Massachusetts General Hospital Robert Wood Johnson Medical School Rutgers University Vita-Salute University School of Medicine San Raffaele Scientific Institute Kaiser Permanente University Heart Center Freiburg-Bad Krozingen Freiburg University of Virginia Medical Center University of Siena Kyung Hee University Gustave Dron Hospital Centro Hospitalar de Lisboa Norte Wexner Medical Center Ohio State University Uppsala University University Hospital of Trieste University Hospital of Verona University Hospital of Padova University of Alabama University of California Davis University of Florida Michael E. DeBakey Department of Surgery Baylor College of Medicine University Hospital University of Missouri Faculdade de Medicina de Botucatu-Unesp