title: Predictive value of NT-pro BNP after acute myocardial infarction: relation with acute and chronic infarct size and myocardial function.
abstract: OBJECTIVE
  We sought to assess the relation of N-terminal brain natriuretic peptide (NT-pro BNP) determined on day 3 after onset of acute myocardial infarction (AMI) symptoms with acute and chronic infarct size and functional parameters assessed by cardiac magnetic resonance (CMR) imaging. Furthermore, we wanted to investigate its predictive value for recovery of myocardial function.
  
  
  METHODS
  CMR was performed in 49 consecutive patients within 6 days and in a subgroup 4 (n = 27) and 12 (n = 22) months after first acute ST-elevation AMI and successful primary angioplasty. NT-pro BNP was measured in the subacute phase at 66 ± 8 h after onset of symptoms.
  
  
  RESULTS
  Log-transformed NT-pro BNP (lgNT-pro BNP) significantly correlated with infarct size in % of left ventricular myocardial mass (r = 0.59 to 0.64; p < 0.004), with ejection fraction (EF) (r = -0.49 to -0.55; p < 0.004) as well as with segmental wall thickening (SWT, mm) (r = 0.41 to -0.52; p < 0.04) at any time of assessment. Multiple linear regression analysis revealed baseline EF and lgNT-pro BNP to predict global functional recovery. Patients with NT-pro BNP concentrations <the mean level of 1115 pg/ml significantly improved in EF and SWT (all p < 0.02) during the study period, whereas patients with NT-pro BNP >1115 pg/ml did not show significant functional recovery (all p = NS).
  
  
  CONCLUSIONS
  NT-pro BNP on day 3 after admission correlates with acute and chronic infarct size and myocardial function after AMI. Global and regional myocardial function did not recover in patients with higher NT-pro BNP (>1115 pg/ml) during subacute phase of AMI.
authors.affiliation: Clinical Division of Cardiology, Innsbruck Medical University, Austria.
authors.forename: Agnes
authors.initials: A
authors.lastname: Mayr
authors.forename: Johannes
authors.initials: J
authors.lastname: Mair
authors.forename: Michael
authors.initials: M
authors.lastname: Schocke
authors.forename: Gert
authors.initials: G
authors.lastname: Klug
authors.forename: Kathrin
authors.initials: K
authors.lastname: Pedarnig
authors.forename: Bernhard Johannes
authors.initials: BJ
authors.lastname: Haubner
authors.forename: Martha
authors.initials: M
authors.lastname: Nowosielski
authors.forename: Thomas
authors.initials: T
authors.lastname: Grubinger
authors.forename: Otmar
authors.initials: O
authors.lastname: Pachinger
authors.forename: Bernhard
authors.initials: B
authors.lastname: Metzler
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D015415:Biomarkers / Q000097:blood; D002908:Chronic Disease; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D019028:Magnetic Resonance Imaging, Cine / Q000379:methods; D008297:Male; D008875:Middle Aged; D009203:Myocardial Infarction / Q000097:blood* / Q000473:pathology*; D009206:Myocardium / Q000473:pathology*; D020097:Natriuretic Peptide, Brain / Q000097:blood*; D010446:Peptide Fragments / Q000097:blood*; D011237:Predictive Value of Tests
chemical_list: D015415:Biomarkers; D010446:Peptide Fragments; C109794:pro-brain natriuretic peptide (1-76); D020097:Natriuretic Peptide, Brain