title: Asymmetric dimethylarginine levels in patients with coronary artery ectasia.
abstract: BACKGROUND
  Endothelial dysfunction might be one of the pathophysiological mechanisms in the development of coronary artery ectasia (CAE) although the exact mechanisms have not yet been demonstrated. Asymmetric dimethylarginine (ADMA), an endogenous competitive inhibitor of nitric oxide synthase, is also related to endothelial and structural dysfunction.
  
  
  OBJECTIVE
  To asses the relationship between CAE and ADMA plasma concentrations.
  
  
  METHODS
  Thirty patients with CAE in a mean age of 55.5 +/- 3.6 years and 40 patients with normal coronary arteries in a mean age of 53.3 +/- 11.6 years were studied. The ADMA levels of all patients were analysed by ELISA method.
  
  
  RESULTS
  The mean ADMA level in the CAE group was found to be significantly higher than the mean ADMA level in the normal coronary artery group (2.26 +/- 0.47 vs. 1.43 +/- 0.40 micromol/l, p < 0.001). The elevated ADMA level (> 1.80 micromol/l) was present in 83.0% of patients from the CAE group and 25.0% of patients from the normal coronary artery group (p < 0.001). Having an increased ADMA level enhanced the risk of CAE 15-fold. The multiple-adjusted OR of the risk of CAE was 18.71 (95% CI 4.95-70.68) for the higher ADMA level compared to the lower level.
  
  
  CONCLUSIONS
  Asymmetric dimethylarginine level is significantly associated with the presence of coronary artery ectasia. These findings suggest that increased ADMA level may be associated with endothelial dysfunction leading to the development of coronary artery ectasia.
authors.affiliation: Department of Cardiology, Yuksek Ihtisas Heart-Education and Research Hospital, Ankara, Turkey. cayserkan@yahoo.com
authors.forename: Serkan
authors.initials: S
authors.lastname: Cay
authors.forename: Goksel
authors.initials: G
authors.lastname: Cagirci
authors.forename: Murat
authors.initials: M
authors.lastname: Akcay
authors.forename: Ozlem
authors.initials: O
authors.lastname: Karakurt
authors.forename: Erkan
authors.initials: E
authors.lastname: Kahraman
authors.forename: Nuray
authors.initials: N
authors.lastname: Yazihan
authors.forename: Aytun
authors.initials: A
authors.lastname: Canga
authors.forename: Ramazan
authors.initials: R
authors.lastname: Akdemir
authors.forename: Sinan
authors.initials: S
authors.lastname: Aydogdu
mesh_terms: D000328:Adult; D000368:Aged; D001120:Arginine / Q000031:analogs & derivatives* / Q000378:metabolism; D015415:Biomarkers / Q000097:blood; D017023:Coronary Angiography; D003330:Coronary Vessel Anomalies / Q000097:blood* / Q000000981:diagnostic imaging; D003430:Cross-Sectional Studies; D004108:Dilatation, Pathologic / Q000378:metabolism; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D044967:Serum / Q000378:metabolism
chemical_list: D015415:Biomarkers; C487735:dimethylarginine; D001120:Arginine