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Our findings indicate that the IL-6 spillover in the peripheral circulation increases with the severity of CHF and that the increase in plasma IL-6 is mainly associated with the activation of the sympathetic nervous system. High plasma levels of IL-6 can provide prognostic information in patients with CHF, independent of left ventricular ejection fraction and plasma NE, suggesting an important role for IL-6 in the pathophysiology of CHF.

These findings indicate that plasma BNP is more useful than ANP for assessing the mortality in patients with chronic CHF and that the plasma levels of BNP provide prognostic information independent of other variables previously associated with a poor prognosis. Our findings also suggest that the compensatory activity of the cardiac natriuretic peptide system is attenuated as mortality increases in chronic CHF patients with high plasma levels of ANP and BNP.

These results indicate that a high plasma brain natriuretic peptide level provides information about mortality and morbidity in patients with asymptomatic or minimally symptomatic left ventricular dysfunction.

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