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Hyperhomocysteinemia (Hhcy) has been associated with pathological and stressful conditions and is a risk factor for cardiovascular disease (CVD). The aim of this study was to evaluate the correlation between plasma homocysteine (hcy) and lipid peroxidation in patient with CVD. This study was carried out on 40 patients with CVD as well as 15 healthy volunteers of comparable age and gender as control group. The patients were divided into 2 groups as follows: group I, included 20 patients with acute myocardial infarction and group II, included 20 patients with atherosclerotic coronary artery disease with no evidence of previous myocardial infarction. Plasma hcy, nitric oxide (NO) and malondialdhyde (MDA) [as index of lipid peroxidation] were measured in all groups. In addition serum total-cholesterol, HDL, LDL and triglycerides were evaluated. Results obtained showed that, there was a significant elevation in the levels of plasma hcy, NO and MDA in groups I and II as compared to control group. There was a strong positive correlation between plasma hcy and MDA (r = 0.59, p &lt; 0.001). Also NO was positively correlated with both hcy (r = 0.49, p &lt; 0.001) and MDA (r = 0.51, p &lt; 0.001). Serum total cholesterol, LDL, and triglycerids were also significantly elevated while serum HDL was significantly decreased in groups I and II as compared to control group. It can be concluded that, hyperhomocysteinemia is a possible factor in free radical generation and therefore cardiovascular diseases.

Plasma Homocysteine and Oxidative Stress in Cardiovascular Disease