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Effect of statins on coronary bifurcation atherosclerosis: an intravascular ultrasound virtual histology study

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Abstract

This study is aimed at assessing by intravascular ultrasound virtual histology (VH-IVUS) the effect of statins on coronary bifurcation atherosclerosis in non-culprit vessels. In this non-randomized study, in 48 patients, 51 bifurcation atherosclerotic sites in non-culprit vessels without significant angiographic stenosis, underwent baseline and 12 months follow-up VH-IVUS. Patients received treatment with either simvastatin (20 mg daily, n = 24) or rosuvastatin (10 mg daily, n = 24) for the same period. VH-IVUS analysis of bifurcation lesions included the 5-mm proximal, bifurcation only (side-branch point) and 5-mm distal subsegments. Overall plaque and external elastic membrane volume decreased after 1 year (115.7 ± 35.5 to 106.1 ± 29.3 mm³, P < 0.001; and 241.0 ± 57.0 to 232.4 ± 54.2 mm³, P = 0.005, respectively). Similarly, overall dense calcium volume significantly increased (7.1 ± 5.3 to 11.0 ± 8.5 mm³, P < 0.010), while fibrous and fibrofatty volumes significantly decreased (36.9 ± 19.2 to 24.1 ± 11.7 mm³, P < 0.001; and 5.1 ± 3.8 to 2.3 ± 2.0 mm³, P < 0.001, respectively), and necrotic core volume did not change significantly (17.0 ± 11.1 to 19.8 ± 13.5 mm³, P = 0.053). There were no significant differences in compositional analysis between the simvastatin and rosuvastatin treatment groups. However, within groups, necrotic core volume significantly increased in the simvastatin treatment group (19.7 ± 13.9 to 24.3 ± 16.1 mm³, P = 0.029) but not in the rosuvastatin treatment group. (14.3 ± 6.7 to 15.6 ± 8.7 mm³, P = 0.423). The independent clinical predictors for reduction of necrotic core volume by multiple stepwise logistic regression analysis were the percent change of HDL-cholesterol level (P = 0.041, odds ratio: 1.052, 95% confidence interval (CI): 1.002 to 1.104) and the percent change of hsCRP level (P = 0.021, odds ratio: 0.989, 95% CI: 0.980 to 0.998). After 1 year, overall dense calcium volume significantly increased whilst fibrous and fibrofatty volumes significantly decreased; no significant change in the content of necrotic core was observed. Although changes in the volumes of all plaque components were not significantly different between the simvastatin and rosuvastatin treatment groups, halting of necrotic core progression was apparent in the rosuvastatin group.

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Authors and Affiliations

  1. Thoraxcenter, Erasmus MC, Rotterdam, The Netherlands

    Eun-Seok Shin, Hector M. Garcia-Garcia, Takayuki Okamura & Patrick W. Serruys

  2. Department of Cardiology, Ulsan University Hospital, University of Ulsan College of Medicine, 290-3 Jeonha-dong, Dong-gu, Ulsan, 682-714, South Korea

    Eun-Seok Shin

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  1. Eun-Seok Shin
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  2. Hector M. Garcia-Garcia
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  3. Takayuki Okamura
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  4. Patrick W. Serruys
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Correspondence to Eun-Seok Shin.

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Shin, ES., Garcia-Garcia, H.M., Okamura, T. et al. Effect of statins on coronary bifurcation atherosclerosis: an intravascular ultrasound virtual histology study. Int J Cardiovasc Imaging 28, 1643–1652 (2012). https://doi.org/10.1007/s10554-011-9989-9

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  • DOI: https://doi.org/10.1007/s10554-011-9989-9

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