European Heart Journal Advance Access originally published online on April 8, 2005
European Heart Journal 2006 27(6):691-699; doi:10.1093/eurheartj/ehi195
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Prognostic significance of serum cholesterol levels in patients with idiopathic dilated cardiomyopathy
Klinik für Innere Medizin, Kardiologie und Intensivmedizin, Philipps University Marburg, Baldingerstraße, D-35033 Marburg, Germany
Received 12 August 2004; revised 28 January 2005; accepted 3 February 2005; online publish-ahead-of-print 8 April 2005.
* Corresponding author. Tel: +49 6421 286 6462; fax: +49 6421 953825. E-mail address: Christ_michael{at}yahoo.de
See page 641 for the editorial comment on this article (doi:10.1093/eurheartj/ehi812)
Aims Previous studies indicate that low cholesterol levels are associated with adverse prognosis in heart failure patients, because elevated lipoprotein levels may negate bacterial endotoxin load induced by gastrointestinal congestion.
Methods and results We examined the prognostic significance of lipid levels in a cohort of 422 patients with idiopathic dilated cardiomyopathy (iDCM) [50±12 years, 342 males, 80 females, left ventricular ejection fraction (LV-EF): 31.6±10.6%]. During 42 months of follow-up, 86 patients (20.3%) died or received a heart transplant. In univariate Cox regression analysis, reduced LV-EF, high New York Heart Association (NYHA) class, and increased LV end-diastolic diameter (LVEDD) were strong risk factors associated with that endpoint, whereas decreased total cholesterol, HDL-cholesterol, and apoprotein I levels were identified as weak risk predictors. After step-wise multivariable analysis, only LVEDD, NYHA class, and LV-EF emerged as parameters independently contributing to the model predicting risk for death or heart transplantation (P<0.05). Cholesterol levels were positively associated with LV-EF and negatively associated with LVEDD (P<0.05). Circulating sCD14 levels, a marker of endotoxin exposure, were related to cholesterol levels (P<0.05) and LV-EF (P<0.05).
Conclusion Decreased cholesterol levels do not independently predict adverse prognosis in patients with iDCM. Our findings indicate that low cholesterol levels are dependent on the severity of cardiac disease.
Key Words: Cholesterol Chronic heart failure Dilated cardiomyopathy Risk stratification
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