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https://www.readbyqxmd.com/read/28820309/advanced-cone-beam-ct-venous-angiographic-imaging
#1
Visish M Srinivasan, Gouthami Chintalapani, Edward A M Duckworth, Peter Kan
OBJECTIVE The evaluation of the venous neurovasculature, especially the dural venous sinuses, is most often performed using MR or CT venography. For further assessment, diagnostic cerebral angiography may be performed. Three-dimensional rotational angiography (3D-RA) can be applied to the venous system, producing 3D rotational venography (3D-RV) and cross-sectional reconstructions, which function as an adjunct to traditional 2D digital subtraction angiography. METHODS After querying the database of Baylor St...
August 18, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28816935/perimesencephalic-nonaneurysmal-subarachnoid-hemorrhage-caused-by-transverse-sinus-thrombosis-a-case-report-and-review-of-literature
#2
Fang-Wang Fu, Jie Rao, Yuan-Yuan Zheng, Liang Song, Wei Chen, Qi-Hui Zhou, Jian-Guang Yang, Jiang-Qiong Ke, Guo-Qing Zheng
RATIONALE: Perimesencephalic nonaneurysmal subarachnoid hemorrhage (PNSAH) is characterized by a pattern of extravasated blood restricted to the perimesencephalic cisterns, normal angiographic findings, and an excellent prognosis with an uneventful course and low risks of complication. The precise etiology of bleeding in patients with PNSAH has not yet been established. The most common hypothesis is that PNSAH is venous in origin. Intracranial venous hypertension has been considered as the pivotal factor in the pathogenesis of PNSAH...
August 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28796991/epidemiology-of-intracranial-and-extracranial-large-artery-stenosis-in-a-population-based-study-of-stroke-in-the-middle-east
#3
Hamidreza Saber, Amin Amiri, Amanda G Thrift, Saverio Stranges, Reza Bavarsad Shahripour, Mohammad T Farzadfard, Naghmeh Mokhber, Réza Behrouz, Mahmoud Reza Azarpazhooh
BACKGROUND: Intracranial large-artery disease (LAD) is a predominant vascular lesion found in patients with stroke of Asian, African, and Hispanic origin, whereas extracranial LAD is more prevalent among Caucasians. These patterns are not well-established in the Middle East. We aimed to characterize the incidence, risk factors, and long-term outcome of LAD strokes in a Middle-Eastern population. METHODS: The Mashhad Stroke Incidence Study is a community-based study that prospectively ascertained all cases of stroke among the 450,229 inhabitants of Mashhad, Iran between 2006 and 2007...
August 11, 2017: Neuroepidemiology
https://www.readbyqxmd.com/read/28756142/pathologic-study-of-intracranial-large-artery-atherosclerosis-in-7260-autopsy-cases
#4
Hiroaki Kimura, Masaki Takao, Norihiro Suzuki, Kazutomi Kanemaru, Ban Mihara, Shigeo Murayama
BACKGROUND: Atherosclerotic changes in the cerebral arteries may differ with era of birth. Herein, we analyzed the chronological changes of intracranial atherosclerosis in consecutive autopsy cases. METHODS: A total of 7260 autopsy cases from 1972 to 2014 were analyzed. Severity of atherosclerosis was classified using a semi-quantitative scale of pathologic observation of each artery after formalin fixation: 0 = no stenosis; .5 = fatty streaks but no stenosis; 1 = <50% stenosis; 2 = 50%-90% stenosis; 3 = ≥90% stenosis...
July 26, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28754270/fast-acceleration-of-asl-based-time-resolved-magnetic-resonance-angiography-by-acquisition-of-control-and-labeled-images-in-the-same-shot-fast-actress-an-optimization-study
#5
Hiroyuki Sugimori, Noriyuki Fujima, Yuriko Suzuki, Hiroyuki Hamaguchi, Kinya Ishizaka, Kohsuke Kudo
PURPOSE: To establish an optimized sequence design for fast acceleration of arterial spin labeling (ASL)-based time-resolved magnetic resonance angiography (MRA) by acquisition of control and labeled images in the same shot (fast ACTRESS) and a scan time of <1min, for the evaluation of intracranial vessels. MATERIALS AND METHODS: Ten healthy volunteers with no unilateral symptomatic arterial stenosis, who underwent 3-tesla MRI, were investigated. Imaging parameters for the fast ACTRESS sequence were set with an acquisition time of 45s...
July 25, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28751515/concordance-of-time-of-flight-mra-and-digital-subtraction-angiography-in-adult-primary-central-nervous-system-vasculitis
#6
H de Boysson, G Boulouis, J-J Parienti, E Touzé, M Zuber, C Arquizan, N Dequatre, O Detante, B Bienvenu, A Aouba, L Guillevin, C Pagnoux, O Naggara
BACKGROUND AND PURPOSE: 3D-TOF-MRA and DSA are 2 available tools to demonstrate neurovascular involvement in primary central nervous system vasculitis. We aimed to compare the diagnostic concordance of vessel imaging using 3D-TOF-MRA and DSA in patients with primary central nervous system vasculitis. MATERIALS AND METHODS: We retrospectively identified all patients included in the French primary central nervous system vasculitis cohort of 85 patients who underwent, at baseline, both intracranial 3D-TOF-MRA and DSA in an interval of no more than 2 weeks and before treatment initiation...
July 27, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28748256/bioresorbable-vascular-scaffolds-in-interventional-neuroradiology
#7
Anil Arat, Ergun Daglioglu, Ilkay Akmangit, Ahmet Peker, Murat Arsava, Mehmet Akif Topcuoglu, Deniz Belen
PURPOSE: Bioresorbable vascular scaffolds (BVS) have changed practice patterns in cardiology. These resorbable stents have not yet been utilized in the cerebrovascular circulation. We report the initial experiences with these devices in interventional neuroradiology. METHODS: A retrospective review of clinical presentations, imaging findings and follow-up results of all patients treated using a BVS by our neurovascular team was carried out using hospital electronic charts and the hospital radiographic archive system...
July 26, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28743241/complete-ophthalmoplegia-complete-ptosis-and-dilated-pupil-due-to-internal-carotid-artery-dissection-as-the-first-manifestation-of-takayasu-arteritis
#8
H M M T B Herath, S P Pahalagamage, D Withana, Sunethra Senanayake
BACKGROUND: Takayasu arteritis is a rare, chronic large vessel vasculitis involving the aorta and its primary branches. As the disease progresses, the active inflammation of large vessels leads to dilation, narrowing and occlusion of the arteries. Arterial dissection is due to separation of the layers of the arterial wall resulting in a false lumen, where blood seeps into the vessel wall. Neurological sequelae of intracranial arterial dissection results from cerebral ischemia due to thromboembolism and hypo perfusion...
July 25, 2017: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/28739521/effective-intraluminal-shunt-in-carotid-endarterectomy-for-carotid-artery-near-occlusion-a-technical-report
#9
Yoichiro Kawamura, Daisuke Maruyama, Yojiro Akagi, Koji Iihara
BACKGROUND: Carotid artery near occlusion is a critical degree of stenosis whereby blood flow is decreased and the distal cervical and intracranial internal carotid arteries (ICAs) are prone to collapse. Considering the diminished perfusion and the risk of progression to total occlusion and periocclusive embolism, we performed carotid endarterectomy (CEA) for carotid artery near occlusion. METHODS: Accurate evaluation of tandem stenosis or patency of the post-stenotic ICA in carotid artery near occlusion is often difficult preoperatively...
July 21, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28734662/transient-global-cerebral-ischemia-induces-rnf213-a-moyamoya-disease-susceptibility-gene-in-vulnerable-neurons-of-the-rat-hippocampus-ca1-subregion-and-ischemic-cortex
#10
Mika Sato-Maeda, Miki Fujimura, Sherif Rashad, Yuiko Morita-Fujimura, Kuniyasu Niizuma, Hiroyuki Sakata, Shuntaro Ikawa, Teiji Tominaga
The RING finger protein 213 (RNF213) is an important susceptibility gene for moyamoya disease (MMD) and is also implicated in other types of intracranial major artery stenosis/occlusion (ICAS); however, the role of RNF213 in the development of ICAS including MMD is unclear. The constitutive expression of the RNF213 gene is relatively weak in brain tissue, while information regarding the expression patterns of the RNF213 gene under cerebral ischemia, which is one of characteristic pathologies associated with ICAS, is currently limited...
September 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28729297/association-between-intracranial-atherosclerotic-calcium-burden-and-angiographic-luminal-stenosis-measurements
#11
H Baradaran, P Patel, G Gialdini, A Giambrone, M P Lerario, B B Navi, J K Min, C Iadecola, H Kamel, A Gupta
BACKGROUND AND PURPOSE: Calcification of the intracranial vasculature is an independent risk factor for stroke. The relationship between luminal stenosis and calcium burden in the intracranial circulation is incompletely understood. We evaluated the relationship between atherosclerotic calcification and luminal stenosis in the intracranial ICAs. MATERIALS AND METHODS: Using a prospective stroke registry, we identified patients who had both NCCT and CTA or MRA examinations as part of a diagnostic evaluation for ischemic stroke...
July 20, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28723788/protective-effect-of-the-microcatheter-placed-at-the-normal-vertebral-artery-in-intracranial-stent-assisted-angioplasty-for-vertebral-artery-stenosis-a-case-report
#12
Ming-Yi Wang, Yong-Sheng Liu, Ke Li, Yong-Jian Liu, Feng Wang
RATIONALE: A carefully designed intracranial stent-assisted angioplasty (SAA) is presented here that may prevent subsequent branch artery occlusion. PATIENT CONCERNS: A 72-year-old man with a 3-month history of progressive and intermittent vertigo without any obvious trigger, accompanied by nausea. DIAGNOSES: Intracranial atherosclerotic disease. INTERVENTIONS: the patient underwent intracranial SAA in accordance with the procedure described here...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28720076/prevalence-and-risk-factors-of-intracranial-and-extracranial-artery-stenosis-in-asymptomatic-rural-residents-of-13-villages-in-china
#13
Haiqiang Jin, Qing Peng, Ding Nan, Pu Lv, Ran Liu, Wei Sun, Yuming Teng, Yuanyuan Liu, Chenghe Fan, Haiying Xing, Ke Xu, Yining Huang
BACKGROUND: The present study aimed to investigate the prevalence and risk factors for extracranial carotid artery stenosis (ECAS) and intracranial carotid artery stenosis (ICAS) simultaneously in asymptomatic Chinese pure rural population. METHODS: We analyzed 2589 asymptomatic subjects aged over 30 yr. by ultrasonography and transcranial Doppler simultaneously in 13 isolated villages by door-to-door investigation. Both ECAS and ICAS were defined as more than 50% stenosis...
July 18, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28708731/noncontrast-hybrid-arterial-spin-labeled-imaging-of-the-intracranial-arteries
#14
Ruth P Lim, Elena Trajcevska, Farah Al Rawi, Dinesh Gooneratne, Windell Ang, Yuliya Perchyonok, Gregory Fitt, Andrew Kemp, Shivraman Giri, Davide Piccini, Amy Brodtmann, Helen Dewey, Ioannis Koktzoglou
OBJECTIVE: The purpose of this study is to evaluate feasibility, image quality (IQ), and accuracy of noncontrast hybrid arterial spin labeling (NoHASL) magnetic resonance angiography (MRA) compared with time of flight (TOF) MRA and contrast-enhanced (CE) MRA in patients with known/suspected cerebrovascular ischemia. METHODS: Thirty inpatients were imaged at 1.5 T. Two neuroradiologists assessed 630 intracranial arterial segments for IQ (1, nondiagnostic; 3, satisfactory for diagnosis; and 5, excellent)...
July 13, 2017: Journal of Computer Assisted Tomography
https://www.readbyqxmd.com/read/28707077/association-of-abcb1-promoter-methylation-with-aspirin-exposure-platelet-function-and-clinical-outcomes-in-chinese-intracranial-artery-stenosis-patients
#15
Xingang Li, Kun Zhao, Ning Ma, Shusen Sun, Zhongrong Miao, Zhigang Zhao
PURPOSE: DNA methylation typically acts to repress gene transcription. ABCB1 is involved in the intestinal absorption of aspirin. We aimed to investigate the impact of methylation status of ABCB1 promoter on aspirin exposure, platelet function, and clinical outcomes in Chinese intracranial artery stenosis patients receiving antiplatelet treatment. METHODS: Symptomatic intracranial artery stenosis patients (without carrying CYP2C19 loss-of-function alleles) receiving antiplatelet therapy were enrolled in this study...
July 13, 2017: European Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28705843/headache-tia-and-subarachnoid-haemorrhage-dissecting-an-unusual-cause-for-stroke-like-symptoms
#16
Elliot T Dawson, Desmond A Brown, Alejandro A Rabinstein
We present a case of supraclinoid internal carotid artery dissection. Eleven months prior, the patient developed isolated periorbital pain and was diagnosed with giant-cell arteritis with iritis. The patient experienced recurrent spells concerning for transient ischaemic attacks and was transferred to our institution for endovascular intervention after head CT revealed an embolic infarct with a 'dense middle cerebral artery sign.' Digital subtraction angiography was negative for occlusion, instead demonstrating luminal stenosis and poststenotic dilatation...
July 13, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28702117/balloon-angioplasty-for-intracranial-atherosclerotic-disease-a-multicenter-study
#17
Lakshmi Sudha Prasanna Karanam, Mukesh Sharma, Anand Alurkar, Sridhar Reddy Baddam, Vijaya Pamidimukkala, Raghavasarma Polavarapu
AIM: To evaluate the role and efficacy of the balloon angioplasty in intracranial atherosclerotic disease (ICAD) in patients who presented with acute stroke due to vessel occlusion and in patients with symptomatic disease despite optimum medical management. METHODS: From 2013 to 2016, a total of 39 patients (24 males and 15 females with a mean age of 64.5 years) underwent balloon angioplasty over a period of 2 years and 8 months in three different institutions in India...
June 2017: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/28677035/symptomatic-carotid-artery-stenosis-surgery-stenting-or-medical-therapy
#18
REVIEW
Ashley M Wabnitz, Tanya N Turan
Symptomatic carotid artery disease is a significant cause of ischemic stroke, and these patients are at high risk for recurrent vascular events. Patients with symptoms of stroke or transient ischemic attack attributable to a significantly stenotic vessel (70-99% luminal narrowing) should be treated with intensive medical therapy. Intensive medical therapy is a combination of pharmacologic and lifestyle interventions consistent with best-known practices as follows: initiation of antiplatelet agent or anticoagulation if medically indicated, high potency statin medication, blood pressure control with goal blood pressure of greater than 140/90, Mediterranean-style diet, exercise, and smoking cessation...
August 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28676650/decreased-estimated-glomerular-filtration-rate-egfr-not-proteinuria-is-associated-with-asymptomatic-intracranial-arterial-stenosis-in-chinese-general-population
#19
Zhaoxia Li, Jinxin Li, Anxin Wang, Hua Pan, Shouling Wu, Xingquan Zhao
The relationship between chronic kidney disease (CKD), which is defined by declined estimated glomerular filtration rate (eGFR) and/or proteinuria, and asymptomatic intracranial arterial stenosis (ICAS) is largely unknown. We conducted a population-based, cross-sectional study by recruiting 5209 participants free of previous stroke, transient ischemic attack and coronary heart disease. eGFR was calculated using the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) formula and proteinuria was estimated with urine dipstick...
July 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28673811/fluid-attenuated-inversion-recovery-vascular-hyperintensities-in-patients-with-transient-ischemic-attack
#20
Marcelo Marinho de Figueiredo, Edson Amaro Júnior, Maramélia Araújo de Miranda Alves, Marcela Vazzoler, Renata Carolina Acre Nunes Miranda, Gisele Sampaio Silva
BACKGROUND: Fluid-attenuated inversion recovery (FLAIR) vascular hyperintensities (FVHs) are common in patients with acute ischemic stroke, possibly representing impaired hemodynamics in the ischemic territory due to intracranial steno-occlusive disease. There are few reports on FVHs in patients with transient ischemic attack (TIA). AIMS: We investigated the prevalence of FVHs and its clinical correlations in patients with TIA. METHODS: We evaluated consecutive patients admitted with TIA from February 2009 to June 2012 who had undergone magnetic resonance imaging within 30 hours of symptoms onset and intracranial and extracranial vascular imaging...
June 30, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
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