Abstract
Background: Chronic kidney disease combined with coronary artery disease is a growing public health issue. Preoperative renal dysfunction is one of the major risk factors for perioperative morbidity and mortality in patients undergoing coronary artery bypass grafting (CABG). This study aimed to analyze the early clinical outcomes of CABG in patients with preoperative renal impairment.
 Methods: The study was conducted from July 2017 to July 2019. We included 100 patients who underwent CABG. Group A (n= 50) included patients with preoperative renal impairment and group B (n= 50) had patients with normal renal functions.
 Results: The mean age was 63.3±9.1 years in Group A and 57.1±8.5 years in Group B (P<0.001). There were 35 males in Group A and 47 in Group B (P<0.001). Blood transfusion was more in Group A (47 (94%) vs. 32 (64%) patients; P=0.001). There was no difference in mortality between both groups.
 Conclusion: Preoperative renal impairment in patients undergoing CABG is more common in elder females. Patients undergoing CABG with preoperative renal impairment could have a higher risk for blood transfusion.
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