title: A direct comparison of the natriuretic peptides and their relationship to survival in chronic heart failure of a presumed non-ischaemic origin.
abstract: The natriuretic peptides have been validated as sensitive and specific markers of left ventricular dysfunction; brain natriuretic peptide (BNP), N-terminal atrial natriuretic peptide (NT-proANP) and N-terminal brain natriuretic peptide (NT-proBNP) elevations have been associated with New York Heart Association (NYHA) Class I-IV heart failure. We directly compared the association of each of these markers with 1-year survival in 173 patients with chronic heart failure of a presumed nonischaemic origin entering the PRAISE-2 Trial, a clinical study which assessed the therapeutic effect of Amlodipine in patients with NYHA Class III and IV heart failure and a left ventricular ejection fraction (LVEF) <30%. BNP, NT-proBNP, and NT-proANP levels were all correlated with 1-year mortality by univariate Cox proportional hazards analyses. With respect to multivariate Cox proportional hazards regression models containing variables deemed significant in univariate analyses, NT-proANP alone was identified as an independent predictor of 1-year mortality when log-transformed continuous covariates were utilized in the analysis. When the analysis was repeated using dichotomous covariates, NT-proANP remained the most significant predictor of 1-year mortality, followed by NT-proBNP, NYHA classification and BNP. We conclude that all three natriuretic peptides are significant predictors of short-term mortality in subjects with chronic congestive heart failure (CHF) of a presumed nonischaemic origin. Larger prospective studies are required to validate the clinical utility of NT-proANP as a discriminating marker of short-term survival, and to validate proposed cutoffs of approximately 2300 pmol/l for NT-proANP, 1500 pg/ml for NT-proBNP, and 50 pmol/l for BNP as prognostic indicators of adverse short-term outcome.
authors.affiliation: McMaster University, St. Joseph's Hospital, 50 Charlton Avenue East, Hamilton, ON, Canada L8N 4A6. stantone@mcmaster.ca
authors.forename: Eric
authors.initials: E
authors.lastname: Stanton
authors.forename: Mark
authors.initials: M
authors.lastname: Hansen
authors.forename: Hairinda C
authors.initials: HC
authors.lastname: Wijeysundera
authors.forename: Peter
authors.initials: P
authors.lastname: Kupchak
authors.forename: Christian
authors.initials: C
authors.lastname: Hall
authors.forename: Jean L
authors.initials: JL
authors.lastname: Rouleau
mesh_terms: D000368:Aged; D009320:Atrial Natriuretic Factor / Q000097:blood*; D005260:Female; D006333:Heart Failure / Q000097:blood* / Q000401:mortality*; D006801:Humans; D008297:Male; D008875:Middle Aged; D020097:Natriuretic Peptide, Brain / Q000097:blood*; D010446:Peptide Fragments / Q000097:blood*; D016016:Proportional Hazards Models; D012372:ROC Curve; D016019:Survival Analysis; D018487:Ventricular Dysfunction, Left / Q000097:blood
chemical_list: D010446:Peptide Fragments; C109794:pro-brain natriuretic peptide (1-76); D020097:Natriuretic Peptide, Brain; D009320:Atrial Natriuretic Factor