The Impact of Postoperative Renal Replacement Therapy on Long-Term Outcome After Cardiac Surgery Increases with Age

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Background and aim of the study:In the present study, we investigated the survival of patients who received postoperative renal replacement therapy (RRT) after cardiac surgery. We specifically focused on factors predicting long-term outcome in elderly patients.Methods:Data of all patients that received unintentional renal replacement therapy following cardiac surgery between 2004 and 2010 were analyzed. Logistic- and Cox regression analyses were performed to detect the predictors of early and late mortality, respectively.Results:During the study period, 11,899 patients underwent cardiac surgery in our center. Post-operative RRT was performed in 138 patients (1.2%). In this group of patients, 30-day mortality included 72 patients (52%) and the total overall mortality included 107 patients (77.5%). Regression analyses revealed that age predicted 30-day mortality (odds ratio = 1.08 [1.03 to 1.12]) as well as late mortality (odds ratio = 1.05 [1.02 to 1.07].Conclusions:Patients requiring RRT after cardiac surgery have a poor prognosis with a high mortality. Older age predicted both 30-day and late mortality in these patients. doi: 10.1111/jocs.12335(J Card Surg 2014;29:464–469)

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