نتایج جستجو برای: plaque inflammation
تعداد نتایج: 203595 فیلتر نتایج به سال:
BACKGROUND AND PURPOSE The genetic influence on carotid atherosclerotic plaque is mostly unknown. This study examines the association between carotid plaque and single nucleotide polymorphisms in selected genes implicated in inflammation and endothelial function. METHODS A total of 43 genes (197 single nucleotide polymorphisms) involved in inflammation and endothelial function were interrogat...
BACKGROUND Vulnerable plaque demonstrates intense inflammation in which macrophages secrete matrix metalloproteinases (MMPs) that degrade the fibrous cap, ultimately leading to rupture, in situ thrombosis, and an associated clinical event. Thus, inhibition of MMP activity or more general suppression of vascular inflammation are attractive targets for interventions intended to reduce plaque rupt...
Rationale: Atherosclerotic plaque is a chronic inflammatory disorder involving lipid accumulation within arterial walls. In particular, macrophages mediate plaque progression and rupture. While PPARγ agonist is known to have favorable pleiotropic effects on atherogenesis, its clinical application has been very limited due to undesirable systemic effects. We hypothesized that the specific delive...
Imaging Atherosclerotic Plaque Inflammation With [F]-Fluorodeoxyglucose Positron Emission Tomography
Background—Atherosclerotic plaque rupture is usually a consequence of inflammatory cell activity within the plaque. Current imaging techniques provide anatomic data but no indication of plaque inflammation. The glucose analogue [F]-fluorodeoxyglucose (FDG) can be used to image inflammatory cell activity non-invasively by PET. In this study we tested whether FDG-PET imaging can identify inflamma...
Background—Vulnerable plaque demonstrates intense inflammation in which macrophages secrete matrix metalloproteinases (MMPs) that degrade the fibrous cap, ultimately leading to rupture, in situ thrombosis, and an associated clinical event. Thus, inhibition of MMP activity or more general suppression of vascular inflammation are attractive targets for interventions intended to reduce plaque rupt...
The current study describes the histopathology of angiographic chronic total occlusions including residual lumen patency, intimal plaque composition, patterns of neovascular channel formation, intimal plaque calcification, and cellular inflammation, analyzed according to occlusion duration and intimal plaque type (fibrocalcific vs. lipid laden vs. mixed). Histologic findings are related to prev...
Inflammation is a determinant of atherosclerotic plaque rupture, the event leading to most myocardial infarctions and strokes. Although conventional imaging techniques identify the site and severity of luminal stenosis, the inflammatory status of the plaque is not addressed. Positron emission tomography imaging of atherosclerosis using the metabolic marker fluorodeoxyglucose allows quantificati...
UNLABELLED Inflammation and angiogenesis are hypothesized to be important factors contributing to plaque vulnerability, whereas calcification is suggested to confer stability. To investigate this in vivo, we combined CT angiography and PET and compared the findings with immunohistochemistry for patients undergoing carotid endarterectomy. METHODS Twenty-one consecutive patients (18 men, 3 wome...
BACKGROUND Inflammation within atherosclerotic lesions contributes to plaque instability and vulnerability to rupture. We set out to evaluate the use of a macrophage labeling agent to identify carotid plaque inflammation by in vivo magnetic resonance imaging (MRI). METHODS AND RESULTS Thirty patients with symptomatic severe carotid stenosis scheduled for carotid endarterectomy underwent multi...
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