© 2004 European Society of Cardiology
NT-proBNP in severe chronic heart failure: rationale, design and preliminary results of the COPERNICUS NT-proBNP substudy
a Medizinische Klinik II, Universitaetsklinikum Schleswig-Holstein Campus Luebeck, Luebeck, Germany
b The Carvedilol Prospective Randomized Cumulative Survival Study Group Germany
c Roche Diagnostics GmbH Mannheim, Germany
d Fa. Koehler GmbH Freiburg, Germany
e Innere Medizin III, Medizinische Universitätsklinik Heidelberg Bergheimer Str. 58, D-69115 Heidelberg, Germany
* Corresponding author. Tel.: +49-6221-56-8670; Fax: +49-6221-56-5516 Sekretariat_Katus{at}med.uni-heidelberg.de
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Abstract |
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Background: Neither profiles nor prognostic value of cardiac N-terminal proBNP (NT-proBNP) have been prospectively evaluated in a sufficient number of patients with severe chronic heart failure (CHF) treated with carvedilol or placebo.
Methods: Baseline and follow-up plasma concentrations of NT-proBNP were measured in the European part of the COPERNICUS Trial. This study enrolled patients with an ejection fraction <25% and symptoms of CHF at rest or on minimal exertion, equally randomized to placebo or carvedilol.
Results: NT-proBNP concentrations were increased at baseline (mean±S.D.=579±822 pmol/l, median=322.5 pmol/l) with a marked decrease during follow-up in the carvedilol, but not in the placebo group. One-year mortality rates were 3.9, 12 and 27.9% in the lower, middle and upper tertiles of NT-proBNP, respectively. When mortality was calculated separately in the placebo and carvedilol group, rates were 0.8, 6.3 and 19.1% in the carvedilol treated but 6.7, 17.9 and 36.9% in the placebo treated patients.
Conclusions: NT-proBNP was a powerful predictor of subsequent all-cause mortality in patients with severe CHF. This marker should therefore be further evaluated for risk stratification and monitoring of therapy in CHF.
Key Words: Heart failure • Natriuretic peptides • Prognosis
Received December 26, 2003; Accepted January 14, 2004
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