title: Plasma cardiac natriuretic peptide determination as a screening test for the detection of patients with mild left ventricular impairment.
abstract: OBJECTIVE
  To determine the usefulness of measuring the cardiac natriuretic peptides, atrial natriuretic factor, N-terminal pro-atrial natriuretic factor, and brain natriuretic peptide, as screening tests for identifying patients with mild left ventricular impairment.
  
  
  METHODS
  Cross-sectional evaluation of the diagnostic accuracy of the cardiac natriuretic peptides.
  
  
  METHODS
  Cardiac catheterisation unit, Norwegian central hospital.
  
  
  METHODS
  A consecutive series of 254 patients undergoing diagnostic left-sided cardiac catheterisation. One hundred and twenty eight of these patients had a history of previous myocardial infarction.
  
  
  METHODS
  The presence of normal and impaired left ventricular function, as evaluated by logistic regression analysis and estimation of the area under the receiver operating characteristic (ROC) curve (an index of overall diagnostic accuracy). Ventricular function was assessed by the measurement of left ventricular end diastolic pressure and angiographically determined left ventricular ejection fraction.
  
  
  RESULTS
  Logistic regression analysis showed that plasma brain natriuretic peptide was the best predictor of increased left ventricular end diastolic pressure (> or = 15 mm Hg) (P < 0.001), decreased left ventricular ejection fraction (< or = 45%) (P < 0.001), and the combination of left ventricular ejection fraction < or = 45% and left ventricular end diastolic pressure > or = 15 mm Hg (P < 0.001). The areas under the ROC function for the detection of left ventricular dysfunction were 0.789 for brain natriuretic peptide, 0.665 for atrial natriuretic factor, and 0.610 for N-terminal pro-atrial natriuretic factor.
  
  
  CONCLUSIONS
  Plasma brain natriuretic peptide seemed to be a better indicator of left ventricular function than plasma atrial natriuretic factor or N-terminal pro-atrial natriuretic factor. However, the overall diagnostic accuracy of circulating atrial natriuretic factor, N-terminal pro-atrial natriuretic factor, and brain natriuretic peptide as indicators of normal and impaired ventricular function in an unselected group of patients with coronary heart disease and a high frequency of previous myocardial infarction was relatively modest.
authors.affiliation: Department of Clinical Biology, University of Bergen Medical School, Norway.
authors.forename: T
authors.initials: T
authors.lastname: Omland
authors.forename: A
authors.initials: A
authors.lastname: Aakvaag
authors.forename: H
authors.initials: H
authors.lastname: Vik-Mo
mesh_terms: D000368:Aged; D009320:Atrial Natriuretic Factor / Q000097:blood*; D015415:Biomarkers / Q000097:blood; D006328:Cardiac Catheterization; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D020097:Natriuretic Peptide, Brain; D009419:Nerve Tissue Proteins / Q000097:blood*; D010446:Peptide Fragments / Q000097:blood; D011237:Predictive Value of Tests; D011498:Protein Precursors / Q000097:blood; D018487:Ventricular Dysfunction, Left / Q000175:diagnosis*
chemical_list: D015415:Biomarkers; D009419:Nerve Tissue Proteins; D010446:Peptide Fragments; D011498:Protein Precursors; C095026:brain natriuretic peptide-35, rat; D020097:Natriuretic Peptide, Brain; D009320:Atrial Natriuretic Factor