title: Reduced thiamine phosphate, but not thiamine diphosphate, in erythrocytes in elderly patients with congestive heart failure treated with furosemide.
abstract: OBJECTIVE
  To measure the concentrations of thiamine and thiamine esters by high-pressure liquid chromatography (HPLC) in elderly patients treated with furosemide for heart failure and in a control group.
  
  
  METHODS
  A cross-sectional study of blood thiamine and thiamine ester concentrations.
  
  
  METHODS
  Forty-one patients admitted to hospital for heart failure and 34 elderly living at home. No vitamin supplementation was allowed.
  
  
  RESULTS
  Compared with the healthy controls, furosemide-treated patients had significantly reduced whole blood thiamine phosphate (TP; 4.4 +/- 2.2 vs. 7.6 +/- 2.0 nmol L-1) and thiamine diphosphate (TPP; 76 +/- 21.5 vs. 91 +/- 19.8 nmol L-1) (mean +/- SD). When the thiamine concentrations were related to the haemoglobin concentrations, which were reduced in the heart failure patients, the levels of TP (nmol g-1 Hb) were 0.38 +/- 0.26 vs. 0.54 +/- 0.17 (P < 0.0001), and of TPP were 6.35 +/- 1.76 vs. 6.37 +/- 1.29 (P = 0.95). There were no differences in T and TP concentrations in plasma between the two groups.
  
  
  CONCLUSIONS
  The elderly patients with heart failure treated with furosemide have not reduced the storage form of thiamine, TPP, but only TP. This change is most likely not an expression of a thiamine deficiency, but rather of an altered metabolism of thiamine, which is not understood at present.
authors.affiliation: Department of Medicine, Section of Cardiology, Sahlgrenska University Hospital/Ostra, Göteborg, Sweden.
authors.forename: L
authors.initials: L
authors.lastname: Härdig
authors.forename: C
authors.initials: C
authors.lastname: Daae
authors.forename: M
authors.initials: M
authors.lastname: Dellborg
authors.forename: F
authors.initials: F
authors.lastname: Kontny
authors.forename: T
authors.initials: T
authors.lastname: Bohmer
mesh_terms: D000368:Aged; D016022:Case-Control Studies; D002851:Chromatography, High Pressure Liquid; D003430:Cross-Sectional Studies; D004232:Diuretics / Q000627:therapeutic use*; D004912:Erythrocytes / Q000378:metabolism*; D005260:Female; D005665:Furosemide / Q000627:therapeutic use*; D006333:Heart Failure / Q000097:blood* / Q000188:drug therapy*; D006801:Humans; D008297:Male; D018709:Statistics, Nonparametric; D013833:Thiamine Monophosphate / Q000097:blood*; D013835:Thiamine Pyrophosphate / Q000097:blood*
chemical_list: D004232:Diuretics; D013833:Thiamine Monophosphate; D005665:Furosemide; D013835:Thiamine Pyrophosphate