Jy. Liu et al., Risks of morbidity and mortality in dialysis patients undergoing coronary artery bypass surgery, CIRCULATION, 102(24), 2000, pp. 2973-2977
Citations number
41
Categorie Soggetti
Cardiovascular & Respiratory Systems","Cardiovascular & Hematology Research
Background-Although dialysis patients are undergoing CABG with increasing f
requency, large studies specifically comparing patient characteristics and
procedure-related risks in this population have not been performed.
Methods and Results-We conducted a regional prospective cohort study of 15
500 consecutive patients undergoing CABG in northern New England from 1992
to 1997. We used multiple logistic regression analysis to examine associati
ons between preoperative dialysis-dependent renal failure and postoperative
events and to adjust for potentially confounding variables. The 279 dialys
is-dependent renal failure patients (1.8%) were 4.4 times more likely to ex
perience in-hospital mortality than were other CABG patients (12.2% versus
3.0%, respectively; P<0.001). Dialysis-dependent renal failure patients wer
e older and had more comorbidities and more severe cardiac disease than did
other CABG patients. After adjusting for these factors in multivariate ana
lysis, however, dialysis-dependent renal failure patients remained 3.1 time
s more likely to die after CABG (adjusted odds ratio [OR] 3.1, 95% CI 2.1 t
o 4.7; P<0.001). Dialysis-dependent renal failure patients compared with ot
her CABG patients also had a substantially increased risk of postoperative
mediastinitis (3.6% versus 1.2%, respectively; adjusted OR 2.4, 95% CI 1.2
to 4.7; P=0.011) and postoperative stroke (4.3% versus 1.7%, respectively;
adjusted OR 2.1, 95% CI 1.1 to 3.9; P=0.016), even after controlling for po
tentially confounding variables. Risks of reexploration for bleeding were s
imilar for patients with and without dialysis-dependent renal failure.
Conclusions-Preoperative dialysis-dependent renal failure is a strong indep
endent risk factor for in-hospital mortality and mediastinitis after CABG.