Effect of statin therapy on the progression of coronary atherosclerosis

BMC Cardiovascular Disorders

Bo Yu¹  Sining Hu¹  Yun Xiao²  Xiang Ban³  Yanli Sun¹  Xia Gu¹  Jinwei Tian¹ 

[1] Key Laboratories of Education Ministry for Myocardial Ischemia; Department of Cardiology, Second Affiliated Hospital of Harbin Medical University, Harbin, 150086, P.R. China;Department of Bioinformatics, Harbin Medical University, Harbin, China;Department of Pathology, Harbin Medical University, Harbin, China

关键词: Intravascular ultrasound;    Meta-analysis;    Statin;    Atherosclerosis;   

Others  :  1084438
DOI  :  10.1186/1471-2261-12-70

 received in 2011-12-20, accepted in 2012-08-29,  发布年份 2012

【 摘 要 】

Background

An increasing number of authors employing intravascular ultrasound (IVUS) and virtual histology (VH-IVUS) have investigated the effect of statin use on plaque volume (PV) and plaque composition. However, inconsistent results have been reported. Therefore, we conducted a meta-analysis to determine the appropriate regimen of statins to effectively stabilize vulnerable coronary plaques.

Methods

Online electronic databases were carefully searched for all relevant studies. We compared mean values of PV and plaque composition between baseline and follow-up in patients receiving statin therapy. We pooled treatment effects and calculated mean differences (MD) with the 95% confidence interval (CI) using a random-effects model. By stratified analyses, we explored the influence of clinical presentation, dose and duration of statin treatment, and low-density lipoprotein-cholesterol (LDL-C) levels on the effects of statins.

Results

Seventeen studies involving 2,171 patients were analyzed. Statin therapy significantly decreased PV (−5.3 mm³; 95% CI: –3.3 mm³ to −7.2 mm³; P < 0.001), without heterogeneity. When considering the dose and duration of statins used, only subgroups employing a high dose and long duration demonstrated a significant reduction in PV (p < 0.001). A significant decrease in PV was noted if achieved LDL-C levels were <100 mg/dL (p < 0.001). Statin treatment could induce a twofold decrease in PV in patients with acute coronary syndrome (ACS) compared with that observed in patients with stable angina pectoris (SAP). A regressive trend was seen for necrotic core volume (MD: –2.1 mm³; 95% CI: –4.7 mm³ to 0.5 mm³, P = 0.11). However, statin use did not induce a significant change for fibrotic, fibro-fatty, or dense calcium compositions.

Conclusions

Our meta-analysis demonstrated that statin therapy (especially that involving a high dose and long duration and achieving <100 mg/dL LDL-C levels) can significantly decrease PV in patients with SAP or ACS. These data suggested that statins can be used to reduce the atheroma burden for secondary prevention by appropriately selecting the statin regimen. No significant change in plaque composition was seen after statin therapy.

【 授权许可】

   
2012 Tian et al.; licensee BioMed Central Ltd.

【 图 表 】

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