View clinical trials related to Intracranial Arteriosclerosis.
Filter by:A prospective, multicenter, cohort study to explore the stroke mechanisms of symptomatic intracranial atherosclerosis, the dynamic changes under aggressive medical treatment and their associations with clinical events using conventional MRI sequences plus high-resolution magnetic resonance (HR-MRI).
This study is to elucidate the morphologic evolution and remodeling of ICAD under stringent control of cardiovascular risk factors.
The study is to attain early recognition of the unstable plaques which have an imminent embolic risk in patients with intracranial atherosclerotic disease (IAD).
The purpose of the study are: 1. To make quality, characterized samples and related data available for future studies, including Genome Wide Association Studies (GWAS), genomics, and biomarker research; 2. To use these samples and related medical information to answer research questions aimed at understanding the genetics and underlying biology of acquired disease and injury to the brain, heart and blood vessels with the express purpose of advancing the search for effective modalities for prevention, treatment, and recovery; 3. To develop additional operational infrastructure to support this project across the Prince of Wales Hospital and divisions, including (1) tracking of patient consent, (2) management of collection and sample processing processes, (3) sample inventory and QC/QA processes, and (4) release of materials to investigators for further research.
To evaluate the clinical benefits and risks of hybrid operating techniques in management of intracranial aneurysms with coexistence of atherosclerotic intracranial arterial stenosis.
This prospective, randomized, single-center clinical trial is designed to figure out the most optimal algorithm of remote ischemic conditioning on patients with chronic cerebral ischemia.
Intracranial atherosclerosis (ICAS) accounts for 10 to 40%, depending on ethnicity, of the 700,000 ischemic strokes in the United States every year. The annual rate of recurrent stroke in patients with optimally treated ICAS remains more than twice the average of other stroke etiologies (12.5% vs. 5). A robust literature has established that vessel wall magnetic resonance imaging (vwMRI) of extracranial carotid vessel wall enhancement (VWE) can predict stroke, independent of stenosis. VWE has been reported in symptomatic ICAS, but the role of local and systemic inflammation is unknown. Inflammatory biomarkers are elevated in symptomatic extracranial atherosclerosis, but the association with vwMRI findings in ICAS has not yet been explored. VWE is typically demonstrated by the uptake of gadolinium MRI contrast into the aneurysm wall or atherosclerotic plaque. A novel MRI contrast agent, ferumoxytol, allows multi-contrast weighting on T1w and T2w images and provides important insight into the role of local vessel wall inflammation by accumulating in macrophages on delayed T2* sequences. To identify effective prevention and treatment strategies for cerebrovascular disease, we need to critically evaluate vwMRI techniques, determine VWE prevalence, and explore the link between VWE and inflammation.
Intracranial atherosclerotic disease (ICAD) is an important cause of ischemic stroke. The occurrence of stroke caused by symptomatic ICAD is significantly different compared with asymptomatic ICAD (19% vs 3.5%), suggesting that plaque vulnerability may be responsible for the difference. Based on the previous high-resolution magnetic resonance vessel wall imaging (HR-MRI) results, the investigators hypothesis that the feature of intracranial plaque enhancement is an important imaging biomarker of plaque instability, which is closely related to stroke. The investigators will establish the ICAD cohort and use HR-MRI to investigate the composition, morphology and the enhancement pattern of symptomatic ICAD plaques. These findings will correlate with biochemical markers, and stroke recurrence, in order to explore: 1. plaque characteristics and the enhancement features between symptomatic ICAD and asymptomatic ICAD 2. the relationship between plaque enhancement and the composition of plaques; 3. relationship among enhancement features of symptomatic ICAD plaques, biomarkers with different clinical significance, 4. evolution of enhancement features of symptomatic ICAD plaques under intensive medical therapy. The investigators aim to explore the correlation between vulnerable plaque stratification and clinical outcomes, to explore the value of vascular responses in the pathogenicity of ICAD vulnerable plaques, as well as to provide objective basis for the establishment of the evaluation criteria of intracranial atherosclerotic vulnerable plaques.
The primary objective of the study will be to determine whether remote limb ischemic conditioning (RLIC) compared with sham RLIC (placebo) treatment reduces the 12-month risk of recurrent IS in patients with a recent TIA or IS caused by stenosis of a major intracranial artery. After screening period, eligible patients will be randomly allocated into 2 groups. In addition, all participants receive an usual clinical therapy.
Purpose: Intracranial atherosclerosis is a common condition in Korean population consisting over 25% of ischemic stroke etiology. American Stroke Association and Korean Stroke Society recommend antiplatelet and statin for the treatment of intracranial atherosclerosis. Besides lowering blood cholesterol levels statin also stabilize atherosclerotic plaque and eventually lower the risk of ischemic stroke. However, little evidence resides on the effect of statin treatment on intracranial atherosclerosis. Recent advance in high-tesla magnetic resonance imaging enables direct imaging of intracranial atherosclerotic plaque and further assessment of treatment efficacy of statin in stabilization of intracranial atherosclerotic plaque became possible.