title: Influence of oxidative stress on the development of collateral circulation in total coronary occlusions.
abstract: OBJECTIVE
  The purpose of this study was to investigate whether the levels of total antioxidant capacity (TAC), total peroxide and oxidative stress index (OSI) are associated with the development of collaterals in total coronary occlusions.
  
  
  METHODS
  Our study group contained 176 consecutive men patients with single-vessel TCO, 94 of whom had poorly developed coronary collateral, while 82 had well-developed coronary collateral. TAC and total peroxide concentration were measured of plasma. The ratio of TAC to total peroxide was accepted as an indicator of oxidative stress.
  
  
  RESULTS
  The values of total peroxide and OSI in the Group I were significantly lower than that in Group II (p<0.001, for both). TAC levels were significantly higher in patients with poorly developed collaterals than in well-developed collateral group (p<0.001). OSI values were also significantly different among the Rentrop class-0, -1, -2 and -3 (ANOVA p<0.001). We found significant correlations between collaterals score and TAC, total peroxide and OSI levels (p<0.001 for all). In multiple linear regression analysis, total peroxide and OSI were independent predictors of collaterals score (p=0.006 and p<0.001 respectively).
  
  
  CONCLUSIONS
  This study clearly demonstrates that the level of OSI is independently and positively associated with the presence of collateral circulation in total coronary occlusion patients.
authors.affiliation: Harran University, Faculty of Medicine, Department of Cardiology, Sanliurfa, Turkey. rdemirbag@yahoo.com
authors.forename: Recep
authors.initials: R
authors.lastname: Demirbag
authors.forename: Mustafa
authors.initials: M
authors.lastname: Gur
authors.forename: Remzi
authors.initials: R
authors.lastname: Yilmaz
authors.forename: Alper Sami
authors.initials: AS
authors.lastname: Kunt
authors.forename: Ozcan
authors.initials: O
authors.lastname: Erel
authors.forename: M Halit
authors.initials: MH
authors.lastname: Andac
mesh_terms: D000975:Antioxidants / Q000378:metabolism; D003097:Collateral Circulation; D003327:Coronary Disease / Q000150:complications / Q000503:physiopathology*; D006801:Humans; D016015:Logistic Models; D008297:Male; D008875:Middle Aged; D015999:Multivariate Analysis; D009389:Neovascularization, Pathologic / Q000209:etiology / Q000503:physiopathology*; D018384:Oxidative Stress; D010545:Peroxides / Q000097:blood; D012307:Risk Factors
chemical_list: D000975:Antioxidants; D010545:Peroxides