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Clinical Trial Summary

People with diabetes mellitus are more prone to coronary heart disease, stroke, and peripheral vascular disease, and diabetes mellitus has been regarded as an independent risk factor for the progression of coronary artery disease. Several studies have been reported that diabetes increased the risk of cardiovascular mortality in both men and women. With the introduction of drug-eluting stents (DESs), the angiographic rates of restenosis at later months have reduced dramatically in several studies. However, even with DESs, diabetic patients showed increased rates of restenosis and late loss index compared with nondiabetic patients. Diabetes has been considered to be a predictor of poor prognosis after percutaneous coronary intervention with drug-eluting stents. Long-term clinical and angiographic outcomes after percutaneous coronary intervention (PCI) with drug-metal stents (DESs) have been demonstrated to be worse in diabetic patients compared with nondiabetic patients. In the era of DESs, no study has demonstrated the clinical and angiographic outcomes in diabetic patients after zotarolimus-eluting stent implantation by using intravascular ultrasound (IVUS).

Pioglitazone is used in the treatment of diabetic patients. Thiazolidinediones increase insulin sensitivity and show favorable effect on blood glucose levels and lipid profiles. The effect of pioglitazone on neointima volume and inflammatory markers has not been compared in prospective manner after zotarolimus-eluting stent implantation. The purpose of this prospective, randomized, single blinded trial is to compare the effect of pioglitazone on inflammatory markers and neointima volume by using IVUS in diabetic patients.


Clinical Trial Description

With the introduction of the DES, the angiographic rates of restenosis have decreased dramatically but less prominently in diabetic patients. Even in the era of DES, diabetes remains a significant predictor of coronary restenosis especially in cases of small baseline and post PCI vessel size, longer stent length, current smokers, and high level of CRP. Restenosis remains a main clinical and angiographic concern after DES implantation especially in diabetic patients. Diabetes has been known as a major risk factor for in-stent restenosis after DES implantation.

1. Primary end point: Comparison of pioglitazone and placebo on 8 months follow-up neointima volume by intravascular ultrasound (IVUS).

2. Secondary end point: Comparison of pioglitazone and placebo on the changes in the levels of inflammatory markers (hsCRP, IL-6, TNF-α, adiponectin). ;


Study Design

Allocation: Randomized, Endpoint Classification: Safety/Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Subject), Primary Purpose: Treatment


Related Conditions & MeSH terms


NCT number NCT00494559
Study type Interventional
Source Korea University Anam Hospital
Contact
Status Completed
Phase Phase 4
Start date July 2007
Completion date July 2015

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