TY - JOUR
T1 - Long-term results of coronary artery bypass grafting in patients with ischemic cardiomyopathy
T2 - The impact of renal insufficiency and noncardiac vascular disease
AU - Soltero, Ernesto R.
AU - Petersen, Nancy J.
AU - Earle, Nan R.
AU - Glaeser, Donald H.
AU - Urbauer, Diana L.
AU - Deswal, Anita
N1 - Funding Information:
Supported in part by grants from the VA Health Services Research & Development Service (#CHF-98-000-1 and IIR 02-082-1). Dr. Deswal is recipient of an Advanced Clinical Research Career Development Award (CRCD #712A) from the VA Cooperative Studies Program.
PY - 2005/4
Y1 - 2005/4
N2 - Background: We examined outcomes of patients with ischemic cardiomyopathy (ICMP), defined by left ventricular ejection fraction (LVEF) <35%, compared with patients with better-preserved LVEF, undergoing coronary bypass graft surgery (CABG). In addition, we examined the relative impact of a reduced LVEF in comparison with other comorbidities on long-term mortality in these patients. Methods and Results: We evaluated 1381 patients (114 with ICMP, 1267 with better-preserved LVEF) who underwent isolated CABG at a tertiary Veterans Administration (VA) hospital between 1990 and 2000 using data from the VA Continuous Improvement in Cardiac Surgery Program and other VA databases. The 5-year survival was 74.0% in patients with ICMP and 84.4% in the group with better-preserved LVEF (p =. 005). LVEF <35% remained a significant predictor of long-term mortality in multivariable models (hazard ratio [HR] 1.55, 95% confidence interval [CI] 1.02-2.35). However, the presence of comorbidities, especially renal insufficiency, peripheral vascular disease, and cerebrovascular disease, had a similar or greater impact on long-term mortality. Renal insufficiency (serum creatinine >1.5 mg/dL) was associated with the highest risk of long-term mortality (HR 2.02, 95% CI 1.46-2.80). The use of a left internal thoracic artery graft reduced the risk of long-term mortality (HR 0.72, 95% CI 0.54-0.98). Conclusion: Even though severely depressed LVEF is associated with an increased risk of long-term mortality, the presence of comorbid factors, especially renal dysfunction and noncardiac vascular disease, increase the risk of long-term mortality by a similar or even larger magnitude. These comorbid factors should be given important consideration when evaluating the risks and benefits of CABG.
AB - Background: We examined outcomes of patients with ischemic cardiomyopathy (ICMP), defined by left ventricular ejection fraction (LVEF) <35%, compared with patients with better-preserved LVEF, undergoing coronary bypass graft surgery (CABG). In addition, we examined the relative impact of a reduced LVEF in comparison with other comorbidities on long-term mortality in these patients. Methods and Results: We evaluated 1381 patients (114 with ICMP, 1267 with better-preserved LVEF) who underwent isolated CABG at a tertiary Veterans Administration (VA) hospital between 1990 and 2000 using data from the VA Continuous Improvement in Cardiac Surgery Program and other VA databases. The 5-year survival was 74.0% in patients with ICMP and 84.4% in the group with better-preserved LVEF (p =. 005). LVEF <35% remained a significant predictor of long-term mortality in multivariable models (hazard ratio [HR] 1.55, 95% confidence interval [CI] 1.02-2.35). However, the presence of comorbidities, especially renal insufficiency, peripheral vascular disease, and cerebrovascular disease, had a similar or greater impact on long-term mortality. Renal insufficiency (serum creatinine >1.5 mg/dL) was associated with the highest risk of long-term mortality (HR 2.02, 95% CI 1.46-2.80). The use of a left internal thoracic artery graft reduced the risk of long-term mortality (HR 0.72, 95% CI 0.54-0.98). Conclusion: Even though severely depressed LVEF is associated with an increased risk of long-term mortality, the presence of comorbid factors, especially renal dysfunction and noncardiac vascular disease, increase the risk of long-term mortality by a similar or even larger magnitude. These comorbid factors should be given important consideration when evaluating the risks and benefits of CABG.
KW - Comorbidities
KW - Coronary artery bypass surgery
KW - Heart failure
KW - Ischemic heart disease
KW - Renal insufficiency
KW - Revascularization
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U2 - 10.1016/j.cardfail.2004.07.008
DO - 10.1016/j.cardfail.2004.07.008
M3 - Article
C2 - 15812749
AN - SCOPUS:16244408619
SN - 1071-9164
VL - 11
SP - 206
EP - 212
JO - Journal of Cardiac Failure
JF - Journal of Cardiac Failure
IS - 3
ER -