Atherosclerosis Clinical Trial
Official title:
Prospective Evaluation of the Xience V Everolimus-Eluting Stent In Saphenous Vein Graft Atherosclerosis: The Stenting Of Saphenous Vein Grafts Xience V Angiographic Study (SOS-Xience V)
The specific aim of the SOS-Xience V study is to examine the 12-month incidence of binary angiographic in-stent restenosis after implantation of the Xience V stent in aortocoronary saphenous vein bypass graft lesions.
Implantation of bare metal coronary stents (BMS) is currently the preferred percutaneous
treatment for aortocoronary saphenous vein bypass graft (SVG) lesions, but is associated
with high risk for in-stent restenosis. Although drug-eluting stents (DES) appear promising,
there are limited and conflicting data on their efficacy and safety in SVGs. Our group
recently completed and reported the results of the SOS (Stenting Of Saphenous vein grafts)
trial that compared a paclitaxel-eluting stent with a similar BMS. There is currently no
data on the use of the second generation DES in these challenging lesions. The SOS-Xience V
study will examine the effects of the Xience V everolimus-eluting stent in SVG lesions.
The specific aim of SOS-Xience V is to examine the 12-month incidence of binary angiographic
in-stent restenosis (defined as a stenosis of > 50% of the minimum lumen diameter of the
target segment) after implantation of the Xience V stent in SVG lesions.
The Xience V stent will be implanted in 40 consecutive patients who need stenting of a SVG
lesion. Patients will undergo repeat follow-up angiography and intravascular ultrasonography
at 12 months and will be followed clinically for 12 months to determine:
1. the incidence of binary angiographic in-stent restenosis, as assessed by 12 month
follow-up quantitative coronary angiography (primary study endpoint), and
2. intra-stent intimal hyperplasia volume accumulation at 12 months, as measured by
intravascular ultrasonography, and (b) 12-month incidence of ischemia-driven target
vessel revascularization, stent thrombosis, and target vessel failure (composite of
cardiac death, myocardial infarction, and target vessel revascularization) (secondary
study endpoints), and (c) percent stent strut coverage by optical coherence tomography
;
Endpoint Classification: Safety/Efficacy Study, Intervention Model: Single Group Assignment, Masking: Open Label, Primary Purpose: Treatment
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