PURPOSE: To determine the prognostic importance of periintervention serum levels of acute-phase reactants in 6-month restenosis after stent implantation in the carotid artery. MATERIALS AND METHODS: One hundred eight consecutive patients with 70% or greater stenosis of the internal carotid artery (ICA) according to the North American Symptomatic Carotid Endarterectomy Trial criteria underwent successful stent implantation in the ICA in a prospective cohort study. Six-month patency was evaluated at color-coded duplex ultrasonography. The association between in-stent restenosis (> or =50%, North American Symptomatic Carotid Endarterectomy Trial criterion) and C-reactive protein (CRP) and serum amyloid A levels at baseline and at 24 and 48 hours after intervention was assessed. RESULTS: Restenosis was found in 15 (14%) patients within 6 months. CRP level at 48 hours, exemplary for the postintervention acute-phase response, was significantly (P =.01) associated with 6-month restenosis by using multiple logistic regression analysis. Recurrent stenosis after prior stent implantation in the carotid artery (odds ratio, 9.2; 95% CI: 1.6, 53.2; P =.01) and residual stenosis of 10%-30% after stent implantation (odds ratio, 9.7; 95% CI: 1.6, 59.3; P =.01) were independent clinical predictors of restenosis. CONCLUSION: Extent of vascular inflammatory response after stent implantation in the carotid artery measured with acute-phase reactants is associated with 6-month patency. Recurrent stenosis after prior stent implantation and initial suboptimal technical result seem to be clinically relevant predictors of postangioplasty outcome. Copyright RSNA, 2003
PURPOSE: To determine the prognostic importance of periintervention serum levels of acute-phase reactants in 6-month restenosis after stent implantation in the carotid artery. MATERIALS AND METHODS: One hundred eight consecutive patients with 70% or greater stenosis of the internal carotid artery (ICA) according to the North American Symptomatic Carotid Endarterectomy Trial criteria underwent successful stent implantation in the ICA in a prospective cohort study. Six-month patency was evaluated at color-coded duplex ultrasonography. The association between in-stent restenosis (> or =50%, North American Symptomatic Carotid Endarterectomy Trial criterion) and C-reactive protein (CRP) and serum amyloid A levels at baseline and at 24 and 48 hours after intervention was assessed. RESULTS:Restenosis was found in 15 (14%) patients within 6 months. CRP level at 48 hours, exemplary for the postintervention acute-phase response, was significantly (P =.01) associated with 6-month restenosis by using multiple logistic regression analysis. Recurrent stenosis after prior stent implantation in the carotid artery (odds ratio, 9.2; 95% CI: 1.6, 53.2; P =.01) and residual stenosis of 10%-30% after stent implantation (odds ratio, 9.7; 95% CI: 1.6, 59.3; P =.01) were independent clinical predictors of restenosis. CONCLUSION: Extent of vascular inflammatory response after stent implantation in the carotid artery measured with acute-phase reactants is associated with 6-month patency. Recurrent stenosis after prior stent implantation and initial suboptimal technical result seem to be clinically relevant predictors of postangioplasty outcome. Copyright RSNA, 2003
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