Association of metabolic syndrome and oxidative stress with ischemic heart disease in middle-aged persons

The aim of this study was to evaluate the association of metabolic syndrome and oxidative stress with ischemic heart disease in middle-aged persons (men and women aged 45-64 years). Material and methods. In this study, we have used data of 533 persons (247 men and 286 women) aged 4564 years from Kaunas population cohort investigated according to WHO MONICA study protocol during 2001-2002 in whom concentrations of malondialdehyde, a marker of lipid peroxidation, and antioxidant vitamin E in blood serum were determined. Metabolic syndrome was defined by the criteria of Adult Treatment Panel III. Oxidative stress was determined in the presence of increased level of malondialdehyde ( >= 5 mu mol/L) and decreased level of lipid-standardized vitamin E (< 20 mu mol/L). The levels of malondialdehyde and vitamin E were measured by fluorimetric methods. Results. Ischemic heart disease was diagnosed in 19.8% of men and 21.3% of women. The frequency of ischemic heart disease among persons (men and women) with metabolic syndrome was significantly higher than among persons without metabolic syndrome (27.4% vs. 17.8%, respectively; odds ratio, 1.63; P=0.032). The frequency of ischemic heart disease among persons with oxidative stress was significantly higher than among persons without oxidative stress (29.1% vs. 17.6%, respectively; odds ratio, 1.88; P=0.029). The highest prevalence of ischemic heart disease (30.0%) was among persons with metabolic syndrome and oxidative stress, and the lowest prevalence of this disease (13.8%) was among persons without metabolic syndrome and without oxidative stress (odds ratio, 2.54; P=0.017). These data were adjusted by sex and age. Conclusion. Metabolic syndrome and oxidative stress are significantly associated with ischemic heart disease among 45-64-year-old persons.