Clinical outcomes after coronary artery bypass grafting in patients with dialysis-dependent end-stage renal disease and an analysis of the related influencing factors

Perioperative and short/mid-term survival rates of dialysis-dependent patients with end-stage renal disease (ESRD), who undergo coronary artery bypass grafting (CABG), and the factors influencing mortality are not well evaluated In China. We retrospectively analyzed the perioperative and postoperative 1-, 3-, and 5-year survival rates of 53 dialysis-dependent ESRD patients who underwent CABG, and compared the factors related to perioperative mortality and all-cause mortality during the postoperative follow-up. Survival rates were expressed as Kaplan-Meier survival curves, and factors influencing the follow-up survival rates were analyzed using the log rank (Mantel-Cox) test. There were eight perioperative deaths, resulting in 15.1% mortality. Intraoperative intra-aortic balloon pump use (P = 0.01), advanced age (P = 0.0027), and high EuroSCORE II score (P = 0.047) were associated with increased perioperative mortality. Forty-five discharged patients were followed from 2 months to 10 years (median, 4.2 years) postoperatively. There were 19 all-cause deaths, including 10 cardiac deaths (10/19, 52.6%). Comparisons between groups indicated that the presence of peripheral artery disease (PAD) increased mortality during follow-up (P = 0.025); 1-, 3-, and 5-year survival rates were 93.3, 79.5, and 66.8%, respectively. The results of the long-rank analysis indicated that the presence of PAD was a risk factor for postoperative survival (log rank chi(2) = 4.543; P = 0.033). Dialysis-dependent patients with ESRD had high perioperative mortality and unsatisfactory short- and medium-term survival after CABG. PAD was a risk factor affecting patients' postoperative survival. Multidisciplinary teamwork is needed to enhance postoperative management and reduce complications, to improve postoperative survival in these patients.