Background: The aim of this study was to examine the influence of ezetimibe in addition to atorvastatin on plaque composition in patients with first-time ST-segment Elevation Myocardial Infarction treated with primary percutaneous intervention.

Methods: Eighty-seven patients were randomized (1:1) to ezetimibe 10mg or placebo in addition to Atorvastatin 80mg. Intravascular ultrasound with iMap was performed at baseline and after 12months in a non-infarct-related artery. Primary endpoint was change in necrotic core (NC). Secondary endpoints were total atheroma volume (TAV) and percentage atheroma volume (PAV).

Results: NC did not change significantly: ezetimibe group 24.9 (11.9, 51.3) mm to 24.9 (15.3, 54.5) mm, p=0.76, placebo group 29.4 (16.3, 78.5) mm to 32.0 (16.0, 88.7) mm, p=0.30, (p=0.35 between groups). TAV was reduced in the ezetimibe group only: ezetimibe (200.0 (135.6, 311.9) mm to 189.3 (126.4, 269.1) mm, p<0.001) compared to placebo group (218.4 (163.5, 307.9) mm to 212.2 (149.9, 394.8) mm, p=0.07) (p=0.56 between groups). PAV was reduced in the ezetimibe group only (40.1±8.6% to 39.2±9.0%, p=0.036) compared to placebo group (43.3±9.4% to 42.2±10.7%, p=0.07), p=0.91 between groups.

Conclusions: Ezetimibe in addition to atorvastatin therapy did not influence NC content, but was associated with regression of coronary atherosclerosis.

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http://dx.doi.org/10.1016/j.carrev.2016.11.010DOI Listing

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