title: Influence of hypertension, left ventricular hypertrophy, and left ventricular systolic dysfunction on plasma N terminal proBNP.
abstract: OBJECTIVE
  To examine the relation between plasma concentration of the N terminal of the precursor of brain natriuretic peptide (NT proBNP), left ventricular hypertrophy (LVH), and left ventricular systolic dysfunction (LVSD) in patients with a history of hypertension.
  
  
  METHODS
  Prospective study.
  
  
  METHODS
  Teaching hospital based study.
  
  
  METHODS
  NT proBNP concentrations were determined in five groups of individuals. Group 1: 15 echocardiographic normal controls; group 2: 22 patients with hypertension, normal left ventricular systolic function, and no LVH; group 3: 24 patients with hypertension, normal left ventricular systolic function, and LVH; group 4: 13 patients with history of hypertension, no history of ischaemic heart disease, and left ventricular wall motion index (WMI) between 1.9-1.3; and group 5:17 patients with a history of hypertension, no history of ischaemic heart disease, and WMI < 1.2.
  
  
  RESULTS
  Median (range) NT proBNP concentrations (in fmol/ml) for groups 1-5, respectively, were: 129.4 (53.6-159.7), 147.4 (54.3-730. 5), 137.1 (35.8-403.9), 356.7 (124.4-934.4), and 493.5 (248.9-909). Mean log NT proBNP differed among all five groups (p < 0.0001), and between groups 4 and 5 versus groups 1-3 (p < 0.0001), and group 4 versus group 5 (p = 0.02) only.
  
  
  CONCLUSIONS
  The results suggest that the presence of hypertension with or without LVH (and normal left ventricular systolic function) does not affect NT proBNP concentrations. Moreover, there is a significant rise in NT proBNP only when LVSD develops in hypertension. Thus, NT proBNP remains a useful diagnostic aid for LVSD, even in hypertensive patients.
authors.affiliation: Department of Medicine and Therapeutics, Robert Kilpatrick Clinical Sciences Building, Leicester Royal Infirmary, Leicester LE2 7LX, UK.
authors.forename: S
authors.initials: S
authors.lastname: Talwar
authors.forename: A
authors.initials: A
authors.lastname: Siebenhofer
authors.forename: B
authors.initials: B
authors.lastname: Williams
authors.forename: L
authors.initials: L
authors.lastname: Ng
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D006973:Hypertension / Q000097:blood* / Q000503:physiopathology; D017379:Hypertrophy, Left Ventricular / Q000097:blood* / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D020097:Natriuretic Peptide, Brain; D009419:Nerve Tissue Proteins / Q000097:blood*; D010446:Peptide Fragments / Q000097:blood*; D011446:Prospective Studies; D012044:Regression Analysis; D018487:Ventricular Dysfunction, Left / Q000097:blood* / Q000503:physiopathology
chemical_list: D009419:Nerve Tissue Proteins; D010446:Peptide Fragments; C109794:pro-brain natriuretic peptide (1-76); D020097:Natriuretic Peptide, Brain