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Independent prognostic value of elevated high-sensitivity C-reactive protein in chronic heart failure
Wei-Hsian Yin1, Jaw-Wen Chen, Hsu-Lung Jen
1Division of Cardiology, Taipei, Taiwan.
Insights
High-sensitivity C-reactive protein (hsCRP) levels predict prognosis in patients with congestive heart failure (CHF). Elevated hsCRP identifies a high-risk group, improving risk stratification beyond left ventricular ejection fraction.
Area of Science:
- Cardiology
- Biomarkers
- Clinical Risk Prediction
Background:
- Serum C-reactive protein (CRP) is mildly elevated in chronic congestive heart failure (CHF) patients, but standard assays lack sensitivity for risk prediction.
- High-sensitivity CRP (hsCRP) assays are now available, enabling assessment of their prognostic value in CHF.
Purpose of the Study:
- To determine the predictive value of hsCRP for prognosis in patients with CHF.
- To assess if hsCRP can improve risk stratification in CHF patients.
Main Methods:
- Examined serum hsCRP levels in 108 patients with CHF and left ventricular ejection fraction (LVEF) <50%.
- Tracked major adverse cardiac events (death, transplantation, hospitalization) over a median follow-up of 403 days.
Main Results:
- hsCRP concentrations significantly increased with CHF severity.
- hsCRP and LVEF were independent predictors of adverse outcomes (P=.047 and P=.024, respectively).
- hsCRP identified a distinct high-risk group, potentially enhancing risk stratification beyond LVEF.
Conclusions:
- Elevated hsCRP is an independent predictor of prognosis in CHF.
- hsCRP provides additional prognostic information for risk stratification and treatment decisions in chronic CHF patients.
Background:
The serum concentration of C-reactive protein (CRP) is mildly elevated in patients with chronic congestive heart failure (CHF), but this level falls well within the range found in healthy subjects. Standard clinical assays for CRP lack sensitivity within the low reference range and thus cannot be used effectively for routine clinical risk prediction. Because assays for high-sensitivity CRP (hsCRP) are now available, we can measure hsCRP to determine its predictive value for the prognosis of patients with CHF.
Methods:
Serum levels of hsCRP in 108 patients with CHF and left ventricular ejection fraction (LVEF) <50% were examined. Major adverse cardiac events (death, heart transplantation, or hospitalization with worsening heart failure) during a median follow-up period of 403 days were determined.
Results:
The concentrations of hsCRP in this study population were significantly increased with the severity of CHF. In a multivariate analysis, LVEF and serum levels of hsCRP were independent significant predictors for adverse outcomes in these patients (hazard ratio, 3.714, P =.024, and hazard ratio, 2.584, P =.047, respectively). However, hsCRP was minimally correlated with LVEF (r = -0.167, P =.084). Further analysis indicated that hsCRP might identify a different high-risk group and could improve risk stratification beyond that of LVEF.
Conclusions:
These findings suggest that an elevated level of hsCRP is an independent predictor of prognosis in CHF and can provide additional prognostic information for the risk stratification and treatment in patients with chronic CHF.
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