IMPACT OF RENAL DYSFUCNTION ON EARLY AND LONG TERM OUTCOMES AFTER CORONARY ARTERY BYPASS GRAFTING

The study is aimed at the comparative assessment of the incidence of adverse cardiovascular events in the inhospital and long-term period in patients with initial renal dysfunction (RD) and without it after coronary artery bypass grafting (CABG).

Material and methods: 720 patients with clinical manifestations of coronary atherosclerosis, operated on between 2011 and 2012, were included in the study. All patients underwent preoperative measurement of serum creatinine levels, the estimation of glomerular filtration rate (GFR) using the MDRD formula, and the risk scoring using the additive EuroSCORE model.

Results: The cut-off value for GFR was set at 60 mL / min / 1.73 m2 in this study, suggesting significant impact on the patients’ outcomes after CABG. There were differences in the preoperative clinical status among the patients with and without RD. Patients with decreased GFR were more likely to have chronic kidney disease, lower extremity arterial disease, extracranial arterial disease, compared to patients with normal GFR. Patients with RD reported higher rates of adverse cardiovascular and renal complications in the in-hospital period. Patients with decreased GFR < 60 mL / min / 1,73m2 were more likely to have recurrent angina and progression of chronic heart failure one year after CABG. The assessment of the impact of renal dysfunction, defined by the levels of GFR, on the development of adverse outcome reported that patients with RD in the moderate risk group were more likely to have combined adverse outcome, compared to patients without RD one year after CABG.

Conclusion: The presence of renal dysfunction has an adverse impact on the in-hospital outcome after CABG. Renal dysfunction had no predictive value on long-term outcome, but it increased the incidence of higher angina class and chronic heart failure.

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