title: Comparison of midregional pro-atrial natriuretic peptide with N-terminal pro-B-type natriuretic peptide in predicting survival in patients with chronic heart failure.
abstract: OBJECTIVE
  Our aim was assess the prognostic value of midregional pro-atrial natriuretic peptide (MR-proANP) using a new immunoassay in patients with chronic heart failure (HF).
  
  
  BACKGROUND
  Assessment of natriuretic peptides represents a useful addition in establishing the diagnosis of chronic HF. Their plasma values are powerful predictors of survival in chronic HF.
  
  
  METHODS
  We assessed MR-proANP in 525 chronic HF patients (derivation study: age 61 +/- 12 years, New York Heart Association (NYHA) functional class I/II/III/IV 6%/44%/41%/9%, N-terminal pro-B-type natriuretic peptide (NT-proBNP) 3,637 +/- 6,362 pg/ml) and validated our findings in 249 additional chronic HF patients (age 63 +/- 9 years, NYHA functional class I/II/III/IV 14%/50%/33%/3%, NT-proBNP 1,116 +/- 1,991 pg/ml).
  
  
  RESULTS
  The MR-proANP levels (mean 339 +/- 306 pmol/l, range 24.5 to 2,280 pmol/l) increased with NYHA functional class (p < 0.0001). During follow-up (>6 months in survivors), 171 patients (33%) died. Increasing MR-proANP was a predictor of poor survival (risk ratio 1.35 per increase in standard deviation, 95% confidence interval 1.17 to 1.57; p = 0.0061), adjusted for NT-proBNP, age, left ventricular ejection fraction, NYHA functional class, creatinine, and body mass index (BMI). In receiver operating characteristic curve analysis of 12-month survival, the area under the curve for MR-proANP was 0.74 and that of NT-proBNP was 0.75 (p = 0.7). In a validation study, MR-proANP levels above the optimal prognostic cutoff value from the validation cohort remained a significant independent predictor of death. In chronic HF patients in NYHA functional class II to III and all subgroups of BMI and kidney function, MR-proANP added prognostic value to NT-proBNP. In patients with BMI > or =30 kg/m2, MR-proANP had higher prognostic power than NT-proBNP.
  
  
  CONCLUSIONS
  Midregional proANP is an independent predictor of mortality in patients with chronic HF. Midregional proANP adds prognostic information to NT-proBNP.
authors.affiliation: Applied Cachexia Research, Department of Cardiology, Charité Medical School, Berlin, Germany. stephan.von.haehling@web.de
authors.forename: Stephan
authors.initials: S
authors.lastname: von Haehling
authors.forename: Ewa A
authors.initials: EA
authors.lastname: Jankowska
authors.forename: Nils G
authors.initials: NG
authors.lastname: Morgenthaler
authors.forename: Corrado
authors.initials: C
authors.lastname: Vassanelli
authors.forename: Luisa
authors.initials: L
authors.lastname: Zanolla
authors.forename: Piotr
authors.initials: P
authors.lastname: Rozentryt
authors.forename: Gerasimos S
authors.initials: GS
authors.lastname: Filippatos
authors.forename: Wolfram
authors.initials: W
authors.lastname: Doehner
authors.forename: Friedrich
authors.initials: F
authors.lastname: Koehler
authors.forename: Jana
authors.initials: J
authors.lastname: Papassotiriou
authors.forename: Dimitrios T
authors.initials: DT
authors.lastname: Kremastinos
authors.forename: Waldemar
authors.initials: W
authors.lastname: Banasiak
authors.forename: Joachim
authors.initials: J
authors.lastname: Struck
authors.forename: Piotr
authors.initials: P
authors.lastname: Ponikowski
authors.forename: Andreas
authors.initials: A
authors.lastname: Bergmann
authors.forename: Stefan D
authors.initials: SD
authors.lastname: Anker
mesh_terms: D000368:Aged; D009320:Atrial Natriuretic Factor / Q000097:blood*; D015415:Biomarkers / Q000097:blood; D002908:Chronic Disease; D015331:Cohort Studies; D005260:Female; D005500:Follow-Up Studies; D006333:Heart Failure / Q000097:blood* / Q000175:diagnosis / Q000401:mortality*; D006801:Humans; D008297:Male; D008875:Middle Aged; D020097:Natriuretic Peptide, Brain / Q000097:blood*; D010446:Peptide Fragments / Q000097:blood*; D011237:Predictive Value of Tests; D015996:Survival Rate / Q000639:trends*
chemical_list: D015415:Biomarkers; D010446:Peptide Fragments; C109794:pro-brain natriuretic peptide (1-76); D020097:Natriuretic Peptide, Brain; D009320:Atrial Natriuretic Factor