title: Oxidized low-density lipoprotein as a predictor of outcome in patients with unstable coronary artery disease.
abstract: BACKGROUND
  The prognostic value of circulating oxidized low-density lipoprotein (OxLDL) in patients with unstable coronary artery disease (CAD) is unknown.
  
  
  METHODS
  Plasma levels of OxLDL were measured in 433 patients with unstable CAD included in FRISC-II (Fragmin and fast Revascularisation in Instability in Coronary artery disease trial) and in 233 of these patients at follow-up 4-7 weeks later. Mortality and myocardial infarction (MI) at 2 years of follow-up was related to above (n=226) or below (n=207) the median level of OxLDL (76 U/L) at study entry.
  
  
  RESULTS
  After adjustment for other well-known predictors of risk, OxLDL levels >76 U/L were associated with a higher risk for recurrent MI (Odds Ratio [95% CI]: 1.90 [1.05-3.39]). When patients were divided according to troponin T (TnT) status, the prognostic value of OxLDL was most evident in the TnT negative group with a risk of MI of 16.9% in patients with elevated OxLDL compared to 1.7% (p=0.004) in those without. No association was found between levels of OxLDL and mortality. At follow-up levels of OxLDL were similar to levels during the acute phase unless patients were treated with statins in which levels were significantly lower.
  
  
  CONCLUSIONS
  Elevated levels of OxLDL may identify patients with unstable CAD, at increased risk for future MI independent of other risk variables, particularly those without evidence of myocardial damage. OxLDL levels appear to be similar in patients during the unstable and stable phase of CAD unless statin therapy is initiated.
authors.affiliation: Department of Medical Sciences, Cardiology, Cardiothoracic Center, University Hospital, 751 85 Uppsala, Sweden. nina.johnston@akademiska.se
authors.forename: Nina
authors.initials: N
authors.lastname: Johnston
authors.forename: Tomas
authors.initials: T
authors.lastname: Jernberg
authors.forename: Bo
authors.initials: B
authors.lastname: Lagerqvist
authors.forename: Agneta
authors.initials: A
authors.lastname: Siegbahn
authors.forename: Lars
authors.initials: L
authors.lastname: Wallentin
mesh_terms: D000368:Aged; D000789:Angina, Unstable / Q000097:blood* / Q000000981:diagnostic imaging / Q000401:mortality; D015415:Biomarkers / Q000097:blood; D017023:Coronary Angiography; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008077:Lipoproteins, LDL / Q000097:blood*; D008297:Male; D008875:Middle Aged; D010084:Oxidation-Reduction; D011379:Prognosis; D012720:Severity of Illness Index; D015996:Survival Rate; D013548:Sweden / Q000453:epidemiology
chemical_list: D015415:Biomarkers; D008077:Lipoproteins, LDL; C099252:oxidized low density lipoprotein