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atherosclerosis MRI stroke

ChunHsien Lin, Yuan-Hsiung Tsai, Jiann-Der Lee, Hsu-Huei Weng, Jen-Tsung Yang, Leng-Chieh Lin, Ya-Hui Lin, Chih-Ying Wu, Ying-Chih Huang, Huan-Lin Hsu, Meng Lee, Chia-Yu Hsu, Yi-Ting Pan, Yen-Chu Huang
Despite advances in imaging techniques and detailed examinations to determine the etiology of a stroke, the cause still remains undetermined in about one fourth of all ischemic strokes. The aim of this prospective study was to determine whether perfusion magnetic resonance imaging (MRI) can differentiate cardioembolic stroke from large artery atherosclerosis (LAA). We recruited 17 cardioembolic stroke and 22 LAA stroke patients, who were classified according to the Trial of Org 10172 in Acute Stroke Treatment and underwent perfusion MRI within 24 hours after the onset of stroke...
September 1, 2016: Current Neurovascular Research
Fei Li, Qian-Xue Chen, Zhi-Biao Chen, Dao-Feng Tian, Qiang Cai
Intracranial atherosclerosis may be related to the risk of ischemic stroke. High-resolution magnetic resonance imaging (H-R MRI) makes it possible to measure the intracranial atheroma in vivo. The aim of this study was to evaluate the plaque burden of the middle cerebral artery (MCA) using H-R MRI, and to determine its relationship with both cerebral infarction size and plaque burden in the carotid artery (CA). 54 patients with MCA territory infarction were enrolled and HR-MRI was performed within 7 days following stroke onset...
August 28, 2016: Current Neurovascular Research
Bian-Rong Wang, Zhou Ou, Teng Jiang, Ying-Dong Zhang, Hong-Dong Zhao, You-Yong Tian, Jian-Quan Shi, Jun-Shan Zhou
BACKGROUND AND AIM: The severity of cerebral microbleeds (CMBs) affected the prognosis of patients with acute cerebrovascular disease. Considering the impact of CMBs on clinical decision, it is necessary to assess the risk factors of CMBs. We aimed to evaluate the independent risk factors of CMBs in patients with acute ischemic stroke of large-artery atherosclerosis. MATERIALS AND METHODS: 112 patients were enrolled in the study. The baseline information, the results of laboratory examination and cranial MRI were collected...
August 20, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
J David Spence
In recent years, there have been a number of advances in the pathogenesis and treatment of atherosclerosis and in assessing prognosis in carotid atherosclerosis. Risk stratification to improve vascular prevention by identifying patients most likely to benefit from intensive therapy is much improved by measuring carotid plaque burden. In patients with asymptomatic carotid stenosis, a number of modalities can be used to identify the 10-15% who could benefit from endarterectomy or stenting. Transcranial Doppler embolus detection, echolucency and ulceration on 3D ultrasound, intraplaque hemorrhage on magnetic resonance imaging (MRI), and reduced cerebrovascular reserve are useful already; new approaches including plaque texture on ultrasound and imaging of plaque inflammation and early calcification on positron emission tomography/computed tomography (PET/CT) are in development...
2016: F1000Research
Hyung-Suk Lee, Hye Lim Lee, Ho-Seong Han, Minju Yeo, Ji Seon Kim, Sung-Hyun Lee, Sang-Soo Lee, Dong-Ick Shin
Ankle brachial index (ABI) and brachial-ankle pulse wave velocity (baPWV) are widely used noninvasive modalities to evaluate atherosclerosis. Recently, evidence has increased supporting the use of ABI and baPWV as markers of cerebrovascular disease. This study sought to examine the relationship between ABI and baPWV with ischemic stroke. This study also aimed to determine which pathogenic mechanism, large artery disease (LAD) or small vessel disease (SVD), is related to ABI or baPWV. Retrospectively, 121 patients with ischemic stroke and 38 subjects with no obvious ischemic stroke history were recruited...
July 2016: Journal of Biomedical Research
Nikki Dieleman, Wenjie Yang, Anja G van der Kolk, Jill Abrigo, Ka Lok Lee, Winnie Chiu Wing Chu, Jaco J M Zwanenburg, Jeroen C W Siero, Ka Sing Wong, Jeroen Hendrikse, Fiona Xiang Yan Chen
BACKGROUND AND PURPOSE: Intracranial vessel wall imaging using MRI has great potential as a clinical method for assessing intracranial atherosclerosis. The purpose of the current study was to compare three 3T MRI vessel wall sequences with different contrast weightings (T1w, PD, T2w) and dedicated sagittal orientation perpendicular to the middle cerebral artery, to the reconstructed sagittal image from a transverse 3D T1w volumetric isotropically reconstructed turbo spin-echo acquisition (VIRTA), and provide a clinical recommendation...
2016: PloS One
Adam de Havenon, Min Park, Scott McNally
No abstract text is available yet for this article.
August 16, 2016: Neurology
Yeon-Jung Kim, Joo Kyung Lee, Sung-Ho Ahn, Bum Joon Kim, Dong-Wha Kang, Jong S Kim, Sun U Kwon
BACKGROUND AND PURPOSE: Middle cerebral artery steno-occlusive disease (MCAD) is not an uncommon cause of ischemic stroke in young Asians. Aside from atherosclerosis, the pathogenesis of MCAD include various nonatherosclerotic vasculopathies, most of which are yet to be defined. This study investigated the pathogenesis of symptomatic isolated MCAD in young Asian patients using high-resolution magnetic resonance imaging (HR-MRI) and mutation analysis of RNF213. METHODS: Patients aged <60 years with stroke or transient ischemic attack caused by MCAD were prospectively enrolled...
September 2016: Stroke; a Journal of Cerebral Circulation
Nobutaka Horie, Yohei Tateishi, Minoru Morikawa, Yoichi Morofuji, Kentaro Hayashi, Tsuyoshi Izumo, Akira Tsujino, Izumi Nagata, Takayuki Matsuo
Acute ischemic stroke with major intracranial vessel occlusion is commonly due to cardioembolic or atherosclerosis-related in situ stenosis/occlusion, and immediate identification of these subtypes is important to establish the optimal treatment strategy. The aim of this study was to clarify the differences in clinical presentation, radiological findings, neurological temporal courses, and outcomes between these etiologies, which have not been fully evaluated. Consecutive emergency patients with acute ischemic stroke were retrospectively reviewed...
October 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
Tae-Jin Song, Young Dae Kim, Joonsang Yoo, Jinkwon Kim, Hyuk-Jae Chang, Geu Ru Hong, Chi Young Shim, Dongbeom Song, Ji Hoe Heo, Hyo Suk Nam
BACKGROUND AND PURPOSE: Cerebral small vessel disease (SVDs) are related with large artery atherosclerosis. However, the association between aortic atheroma (AA) and cerebral small vessel disease has rarely been reported. This study evaluated the relationship between presence and burden of AAs and those of SVDs in patients with acute ischemic stroke. METHODS: We included 737 consecutive patients who underwent transesophageal echocardiography (TEE) and brain magnetic resonance imaging (MRI) for evaluation of acute stroke...
September 2016: Journal of Stroke
Emily B Levitan, Ali Ahmed, Donna K Arnett, Joseph F Polak, W Gregory Hundley, David A Bluemke, Susan R Heckbert, David R Jacobs, Jennifer A Nettleton
BACKGROUND: Data are limited on the relation between dietary patterns and left ventricular (LV) structure and function. OBJECTIVE: We examined cross-sectional associations of a diet-score assessment of a Mediterranean dietary pattern with LV mass, volume, mass-to-volume ratio, stroke volume, and ejection fraction. DESIGN: We measured LV variables with the use of cardiac MRI in 4497 participants in the Multi-Ethnic Study of Atherosclerosis study who were aged 45-84 y and without clinical cardiovascular disease...
September 2016: American Journal of Clinical Nutrition
Jonathan R Weir-McCall, Deirdre B Cassidy, Jill J F Belch, Stephen J Gandy, J G Houston, Matthew A Lambert, Roberta C Littleford, Janice Rowland, Allan D Struthers, Faisel Khan
OBJECTIVE: To determine the feasibility of using whole-body cardiovascular MRI (WB-CVMR) to compare South Asians (SAs)-a population known to have a higher risk of cardiovascular disease (CVD) but paradoxically lower prevalence of peripheral arterial disease-and Western Europeans (WEs). METHODS: 19 SAs and 38 age-, gender- and body mass index-matched WEs were recruited. All were aged 40 years and over, free from CVD and with a 10-year risk of CVD <20% as assessed by the adult treatment panel (ATP) III risk score...
September 2016: British Journal of Radiology
David S Wenger, Steven M Kawut, Jingzhong Ding, David A Bluemke, Catherine L Hough, Richard A Kronmal, Joao A Lima, Peter J Leary
BACKGROUND: Pericardial fat has been implicated in the pathogenesis of obesity-related cardiovascular disease. Proposed mechanisms may be relevant in right heart failure, but relationships between pericardial fat and right ventricular (RV) morphology have not been explored. METHODS: The Multi-Ethnic Study of Atherosclerosis is a prospective cohort that enrolled participants without clinical cardiovascular disease. Pericardial fat was measured using computed tomography and RV parameters using cardiac MRI...
2016: PloS One
Parasuraman Padmanabhan, Ajay Kumar, Sundramurthy Kumar, Ravi Kumar Chaudhary, Balázs Gulyás
UNLABELLED: Nanoparticles (NPs) are playing a progressively more significant role in multimodal and multifunctional molecular imaging. The agents like Superparamagnetic iron oxide (SPIO), manganese oxide (MnO), gold NPs/nanorods and quantum dots (QDs) possess specific properties like paramagnetism, superparamagnetism, surface plasmon resonance (SPR) and photoluminescence respectively. These specific properties make them able for single/multi-modal and single/multi-functional molecular imaging...
September 1, 2016: Acta Biomaterialia
Zhensen Chen, Ao-Fei Liu, Huijun Chen, Chun Yuan, Le He, Yandong Zhu, Maobin Guan, Wei-Jian Jiang, Xihai Zhao
PURPOSE: Basilar artery (BA) atherosclerosis is an important cause of perforator stroke in the brainstem due to plaque involvement of the perforator ostia in BA dorsal or lateral walls. Therefore, to acquire information on plaque distribution is important to better understand and prevent the perforator stroke. This study aimed to comprehensively evaluate BA plaque distribution with 3D magnetic resonance imaging (MRI) vessel wall imaging. MATERIALS AND METHODS: Consecutive patients with cerebrovascular symptoms and stenosis or irregular luminal surface of BA were recruited and underwent BA 3D proton density-weighted volume isotropic turbo spin echo acquisition (VISTA) imaging at 3T...
June 1, 2016: Journal of Magnetic Resonance Imaging: JMRI
Kentaro Hayashi, Yoshitaka Matsuo, Keisuke Toyoda, Yukishige Hayashi, Kiyoshi Shirakawa, Makio Kaminogo
A 75-year-old man with a history of diabetes mellitus and hypertension was suffered from dizziness and vomiting and brought to the near-by hospital. MRI showed cerebellar infarction due to right vertebral artery stenosis. Despite best medical treatment, the infarction progressed day by day and he was transferred to our hospital five days later. Neurological examination showed mild disturbance of consciousness and right hemiparesis. Right vertebral angiography revealed high-grade stenosis accompanied with atherosclerosis at the V3-V4 portion...
May 2016: No Shinkei Geka. Neurological Surgery
Y Zhao, M Jin, Q Liu, Diyan Liu, J Chen, B Du
OBJECTIVE: To evaluate the safety and efficacy of Enterprise stent in the treatment of severe symptomatic basilar artery atherosclerosis stenosis. METHODS: All patients who underwent Enterprise stent for the treatment of symptomatic basilar artery atherosclerotic stenosis in our center from Nov. 2011 to Nov. 2014 were enrolled in the study. Preoperative and postoperative dual antiplatelet drugs and intensive lipid-lowering therapy were given to all the patients...
May 1, 2016: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
Payman Zamani, Scott M Lilly, Patrick Segers, David R Jacobs, David A Bluemke, Daniel A Duprez, Julio A Chirinos
BACKGROUND: Left Ventricular (LV) afterload is composed of systemic vascular resistance (SVR) and components of pulsatile load, including total arterial compliance (TAC) and reflection magnitude (RM). RM, which impacts the LV systolic loading sequence, has been shown to strongly predict HF. Effective arterial elastance is a commonly used parameter initially proposed to be a lumped index of resistive and pulsatile afterload. We sought to assess how various LV afterload parameters predict heart failure (HF) risk and whether RM predicts HF independent of subclinical atherosclerosis...
April 19, 2016: Journal of Cardiac Failure
Xin Xu, Yafen Wei, Xiandong Zhang, Lili Yang, Zhitang Cui, Junjie Yan
PURPOSE: To investigate the correlation between middle cerebral atherosclerosis and capsular warning syndrome (CWS) and assess the value of higher-resolution magnetic resonance imaging (MRI) in prognostication. MATERIALS AND METHODS: In all, 97 transient ischemic attack (TIA) patients who underwent an MRI from February 2010 to December 2013 were included in the retrospective study and divided into either a CWS or middle cerebral artery (MCA) TIA group according to their eventual clinical diagnosis...
April 15, 2016: Journal of Magnetic Resonance Imaging: JMRI
Ralph Rahme, Nilesh A Vyas, John F Hamilton
BACKGROUND: Ischemic stroke is being increasingly recognized as a possible cause of spontaneous isolated convexity subarachnoid hemorrhage (SAH). However, it is a much less established cause of cisternal, aneurysmal-like SAH. Only 3 case reports of concomitant cisternal SAH and perforator infarcts exist in the literature, raising the possibility of perforating artery rupture as a potential mechanism. In contrast, embolic stroke is not recognized as a cause of aneurysmal-like SAH. CASE DESCRIPTION: In 2 patients with embolic cerebral infarctions mimicking intracranial aneurysm rupture, diagnosis was confirmed by magnetic resonance imaging with diffusion-weighted imaging after cerebral angiography failed to reveal an underlying vascular lesion...
July 2016: World Neurosurgery
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