Circulation Journal
Online ISSN : 1347-4820
Print ISSN : 1346-9843
ISSN-L : 1346-9843
Clinical Investigation
Elevated Plasma Levels of Oxidized Low-Density Lipoprotein Relate to the Presence of Angiographically Detected Complex and Thrombotic Coronary Artery Lesion Morphology in Patients With Unstable Angina
Hajime YamashitaShoichi EharaMinoru YoshiyamaTakahiko NarukoKazuo HazeNobuyuki ShiraiYoshimi SugamaYoshihiro IkuraMasahiko OhsawaHiroyuki ItabeToru KataokaYoshiki KobayashiAnton E. BeckerJunichi YoshikawaMakiko Ueda
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2007 Volume 71 Issue 5 Pages 681-687


Background Increased levels of oxidized low-density lipoprotein (ox-LDL) are related to plaque instability, so the aim of the present study was to investigate whether there is a relationship between angiographic coronary plaque morphology in patients with unstable angina pectoris (UAP) and the level of ox-LDL. Methods and Results Plasma ox-LDL levels were measured in 149 patients with UAP and in 88 control subjects, using a highly sensitive enzyme-linked immunosorbent assay method. Angiographic morphology of the culprit lesion was classified as either simple or complex based on the Ambrose classification. Plasma ox-LDL levels in patients with Braunwald class III were significantly higher than in patients with class I (p<0.0001) or in control subjects (p<0.0001). In each of the 3 Braunwald classes, plasma ox-LDL levels in patients with a complex lesion were significantly higher than in patients with a simple lesion. Multivariate logistic regression analysis revealed that ox-LDL level and Braunwald class III were independent factors associated with angiographically detected complex lesions. Conclusion In each Braunwald class of UAP, elevated plasma levels of ox-LDL closely relate to the presence of angiographically detected complex and thrombotic lesion morphology. (Circ J 2007; 71: 681 - 687)

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