Circulation Journal
Online ISSN : 1347-4820
Print ISSN : 1346-9843
Cardiovascular Intervention
Effect of Ezetimibe on Stabilization and Regression of Intracoronary Plaque ― The ZIPANGU Study ―
Yasunori UedaTakafumi HiroAtsushi HirayamaSei KomatsuHiroshi MatsuokaTadateru TakayamaMasaharu IshiharaTakatoshi HayashiSatoshi SaitoKazuhisa Kodamafor the ZIPANGU Investigators
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2017 Volume 81 Issue 11 Pages 1611-1619

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Abstract

Background:Diminishing yellow color is associated with plaque stabilization. We assessed the hypothesis that a combination of ezetimibe and statin provides more effective plaque stabilization and regression than statin alone as assessed by plaque color.

Methods and Results:Stable coronary artery disease patients (n=131) who underwent elective percutaneous coronary intervention and had yellow plaques were randomized to combination therapy (atorvastatin 10–20 mg and ezetimibe 10 mg/day; Group C) or statin monotherapy (atorvastatin 10–20 mg; Group M). Changes in plaque color and plaque volume during 9 months were assessed by angioscopy and intravascular ultrasound. Low-density lipoprotein cholesterol (LDL-C) decreased from 103±28 to 63±18 mg/dL in Group C (P<0.001) and from 100±28 to 75±17 mg/dL in Group M (P<0.001). Yellow color grade decreased significantly in both Group M (2.1±1.1 vs. 1.7±1.0, P=0.005) and Group C (2.2±1.2 vs. 1.8±1.2, P=0.002), but did not differ between the groups. %plaque volume did not change in Group M (48.5±10.2% vs. 48.2±10.4%, P=0.4), but decreased significantly in Group C (50.0±9.8% vs. 49.3±9.8%, P=0.03).

Conclusions:Compared with statin monotherapy, combination therapy with ezetimibe further reduced LDL-C levels. Significant plaque volume reduction was achieved by the combination therapy, but not statin monotherapy; however, plaque stabilization was similarly achieved by both therapies. Furthermore, reduction in plaque volume was dependent on reduction in LDL-C, regardless of whether it was achieved by statin alone or statin plus ezetimibe.

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© 2017 THE JAPANESE CIRCULATION SOCIETY
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