Plasma Levels of Oxidized Low Density Lipoprotein Are Associated With Stable Angina Pectoris and Modalities of Acute Coronary Syndrome

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The role of plasma levels of oxidized low density lipoprotein (OxLDL) in the development of coronary heart disease (CHD) has not been fully elucidated. We examined the relationship among plasma levels of OxLDL, measured by an enzyme immunoassay using an antibody against OxLDL (FOH1a/DLH3) and apolipoprotein B, CHD, and modalities at the onset of acute coronary syndrome (ACS). A total of 115 individuals who underwent coronary angiography were studied. Of these, 21 patients complicated with extracoronary cardiovascular diseases were excluded. Consequently, 94 patients (63 men) (ACS: 23, stable angina pectoris (SAP): 46, and normal coronary artery (NCA):25) were eligible for inclusion in the study. Elevated plasma levels of OxLDL were associated with CHD, especially with ACS. In patients with NCA, hypertension was associated with plasma OxLDL. Plasma levels of OxLDL were significantly higher in patients with new-onset type ACS than in those with worsening type ACS (2.98 versus 1.53 mg/dL, P = 0.002). In conclusion, plasma levels of OxLDL are associated with CHD and significantly higher in patients with new-onset ACS. The findings of the present study suggest that plasma OxLDL can be a marker of the development of CHD and modalities of ACS.
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