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Background Infections remain a frequent complication of patients (patients) with ventricular assist devices (VAD). We evaluated the epidemiology and outcomes of VAD infections at our center over a 10-year period. Methods We performed a retrospective cohort study of continuous-flow VAD recipients from July 2008-September 2018. VAD-specific and -related infections were characterized according to 2013 ISHLT definitions. Summary and comparative statistics were performed using IBM® SPSS Statistics version 25.0. Results 433 VADs were implanted into 375 patients. A total of 86 VAD infections occurred in 79 patients, with a mean incidence of 0.19 episodes/VAD and 0.20 episodes/pt. Patients with infections were predominantly male (73.3%) and Caucasian (54.6%), and had mean age of 52.7 years, nonischemic cardiomyopathy (58.1%), and VAD as bridge to transplant (53.5%, n = 46). Types of VAD included 43.0% axial (n = 37) and 57.0% centrifugal flow (n = 49). 78% of patients with infections were colonized with at least one multidrug-resistant organism (MDRO) such as MRSA (29%), VRE (73%), and ESBL (24%). Notably, 15% of infections (n = 13) occurred within 60 d of VAD implantation, with mean time to onset 36 d (5–60 d) post-VAD. Early infections ( 60d), impacted sites included DLES (n = 38), pocket (n = 7), and pump (n = 40), with 42 BSI, 36 IE, and 2 mediastinitis. Pathogens were 68.5% GP (n = 50), 37.0% GN (n = 27), 2.7% anaerobes (n = 2), 2.7% fungi (n = 2), 17.8% MDRO (n = 13), and 26.0% polymicrobial (n = 19). Conclusion In this longitudinal retrospective cohort of patients supported with VADs, a majority of infections occurred &gt;9 months post-implantation. GP pathogens predominated at all time-points. GN bacteria, including MDROs, anaerobes, and fungi are increasingly encountered. The vast majority of patients were colonized with ³1 MDRO during the course of VAD implantation. Disclosures All authors: No reported disclosures.

1177. A Spectrum of Infectious Complications in Continuous-Flow Ventricular Assist Devices: A Single-Center Longitudinal Cohort