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Intracranial artery stenosis

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https://www.readbyqxmd.com/read/29345035/pressure-and-pipes-from-neuroimaging-to-virtual-measurement
#1
Marialuisa Zedde, Rosario Pascarella
Leng et al. [1] described the practical application of a computational fluid dynamics (CFD) model based on Computed Tomography Angiography (CTA) in 85 patients with symptomatic atherosclerotic M1 middle cerebral artery (MCA) stenosis, to virtually measure arterial pressure (AP) across the stenotic segment, according to the theory that translesional pressure gradient (PG) drives arteriologenesis and leptomeningeal collaterals (LMC) development. This is a fundamental pathophysiological issue about the risk of recurrent stroke downstream an intracranial artery stenosis and both the degree of stenosis and the collateral circulation affect it; in WASID trial [2] patients with severe (> 70%) intracranial stenosis and efficient collaterals had a lower risk of recurrent stroke than patients with poor collaterals...
January 18, 2018: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29343148/predictors-of-intracranial-hemorrhage-volume-and-distribution-in-brain-arteriovenous-malformation
#2
Jay F Yu, Andrew D Nicholson, Jeffrey Nelson, Matthew D Alexander, Stephanie H Tse, Steven W Hetts, J Claude Hemphill, Helen Kim, Daniel L Cooke
Background and purpose Despite evidence regarding risk factors for brain arteriovenous malformation (bAVM)-associated spontaneous intracranial hemorrhage (ICH), few data exist describing the spectrum of clinical outcomes that bAVM-associated ICH may manifest. This study aimed to identify the demographical, clinical, and bAVM anatomical variables associated with ICH volume and the presence of intraventricular hemorrhage (IVH) of ruptured bAVMs, two indicators of worse clinical outcome, to help better predict outcome for unruptured bAVMs...
January 1, 2018: Interventional Neuroradiology
https://www.readbyqxmd.com/read/29339317/arterial-stenosis-in-antiphospholipid-syndrome-update-on-the-unrevealed-mechanisms-of-an-endothelial-disease
#3
REVIEW
Ghita Harifi, Wared Nour-Eldine, Mohammad Hassan A Noureldine, Mohammad Baker Berjaoui, Romy Kallas, Rita Khoury, Imad Uthman, Jamal Al-Saleh, Munther A Khamashta
First described in 1983, antiphospholipid syndrome (APS) is an autoimmune condition characterized by the occurrence of recurrent arterial and/or venous thrombosis, and/or pregnancy morbidity, in the setting of persistent presence of antiphospholipid antibodies (aPL). While thrombosis is the most well-known pathogenic mechanism in this disorder, the relevance of some other mechanisms such as arterial stenosis is being increasingly recognized. Arterial stenosis has been first described in the renal arteries in patients with APS, however intracranial and coeliac arteries can also be involved with various and treatable clinical manifestations...
January 12, 2018: Autoimmunity Reviews
https://www.readbyqxmd.com/read/29330520/association-of-homocysteine-with-aysmptomatic-intracranial-and-extracranial-arterial-stenosis-in-hypertension-patients
#4
Yan Wang, Jin Zhang, Yuesheng Qian, Xiaofeng Tang, Huawei Ling, Kemin Chen, Yan Li, Pingjin Gao, Dingliang Zhu
Elevated plasma homocysteine (Hcy) is suggested as an independent risk factor for stroke. We aimed to investigate the association of Hcy concentration with intracranial atherosclerosis (ICAS) and extracranial AS (ECAS) in hypertensive patients without stroke in Chinese population and to explore modified effect of methylenetetrahydrofolate reductase (MTHFR) C677T on their relationship. The stenosis of intracranial and extracranial arteries were evaluated in a total of 929 subjects through computerized tomographic angiography (CTA) from aortic arch to the skull base...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29330312/high-sensitive-c-reactive-protein-and-dual-antiplatelet-in-intracranial-arterial-stenosis
#5
Jiejie Li, Anxin Wang, Xingquan Zhao, Liping Liu, Xia Meng, Jinxi Lin, Jing Jing, Xinying Zou, Yilong Wang, Yongjun Wang
OBJECTIVE: To determine the relationship of high-sensitive C-reactive protein (hsCRP) and the efficacy and safety of dual antiplatelet therapy in patients with and without intracranial arterial stenosis (ICAS) in the Clopidogrel in High-Risk Patients with Acute Non-disabling Cerebrovascular Events (CHANCE) trial. METHODS: A subgroup of 807 patients with both magnetic resonance angiography images and hsCRP measurement was analyzed. Cox proportional hazards models were used to assess the interaction of hsCRP levels with the effects of dual and single antiplatelet therapy...
January 12, 2018: Neurology
https://www.readbyqxmd.com/read/29325952/endovascular-treatment-of-intracranial-aneurysms-concomitant-with-severe-adjacent-atherosclerotic-stenosis
#6
Bu-Lang Gao, Zhao-Shuo Li, Tian-Xiao Li, Jiang-Yu Xue, Guang Feng, Zi-Liang Wang, Wei-Xing Bai, Tong-Yuan Zhao, Xiao-Dong Liang
PURPOSE: To investigate the effect and safety of endovascular treatment of intracranial aneurysms concomitant with severe adjacent atherosclerotic stenosis. MATERIALS AND METHODS: Twenty-six patients with aneurysms and adjacent stenosis were prospectively enrolled. The characteristics of the aneurysm, parent artery, atherosclerotic stenosis and endovascular treatment methods were analyzed. RESULTS: All aneurysms were successfully embolized (100%), with stent-assisted coiling in forteen (53...
January 8, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29324900/internal-carotid-artery-stenosis-a-novel-surgical-model-for-moyamoya-syndrome
#7
Jill M Roberts, Michael E Maniskas, Justin F Fraser, Gregory J Bix
Moyamoya is a cerebrovascular disorder characterized by progressive stenosis of the intracranial internal carotid arteries. There are two forms: Disease and Syndrome, with each characterized by the sub-population it affects. Moyamoya syndrome (MMS) is more prominent in adults in their 20's-40's, and is often associated with autoimmune diseases. Currently, there are no surgical models for inducing moyamoya syndrome, so our aim was to develop a new animal model to study this relatively unknown cerebrovascular disease...
2018: PloS One
https://www.readbyqxmd.com/read/29300374/clinical-history-and-management-recommendations-of-the-smooth-muscle-dysfunction-syndrome-due-to-acta2-arginine-179-alterations
#8
Ellen S Regalado, Lauren Mellor-Crummey, Julie De Backer, Alan C Braverman, Lesley Ades, Susan Benedict, Timothy J Bradley, M Elizabeth Brickner, Kathryn C Chatfield, Anne Child, Cori Feist, Kathryn W Holmes, Glen Iannucci, Birgit Lorenz, Paul Mark, Takayuki Morisaki, Hiroko Morisaki, Shaine A Morris, Anna L Mitchell, John R Ostergaard, Julie Richer, Denver Sallee, Sherene Shalhub, Mustafa Tekin, Anthony Estrera, Patricia Musolino, Anji Yetman, Reed Pyeritz, Dianna M Milewicz
PurposeSmooth muscle dysfunction syndrome (SMDS) due to heterozygous ACTA2 arginine 179 alterations is characterized by patent ductus arteriosus, vasculopathy (aneurysm and occlusive lesions), pulmonary arterial hypertension, and other complications in smooth muscle-dependent organs. We sought to define the clinical history of SMDS to develop recommendations for evaluation and management.MethodsMedical records of 33 patients with SMDS (median age 12 years) were abstracted and analyzed.ResultsAll patients had congenital mydriasis and related pupillary abnormalities at birth and presented in infancy with a patent ductus arteriosus or aortopulmonary window...
January 4, 2018: Genetics in Medicine: Official Journal of the American College of Medical Genetics
https://www.readbyqxmd.com/read/29279888/prevalence-of-systemic-atherosclerosis-burdens-and-overlapping-stroke-etiologies-and-their-associations-with-long-term-vascular-prognosis-in-stroke-with-intracranial-atherosclerotic-disease
#9
Takao Hoshino, Leila Sissani, Julien Labreuche, Gregory Ducrocq, Philippa C Lavallée, Elena Meseguer, Céline Guidoux, Lucie Cabrejo, Cristina Hobeanu, Fernando Gongora-Rivera, Pierre-Jean Touboul, Philippe Gabriel Steg, Pierre Amarenco
Importance: Patients who have experienced stroke with intracranial atherosclerotic disease (ICAD) may also have concomitant atherosclerosis in different arterial beds and other possible causes for ischemic stroke. However, little is known about the frequency and prognostic effect of such overlapping diseases. Objectives: To describe the prevalence of systemic atherosclerotic burdens and overlapping stroke etiologies and their contributions to long-term prognoses among patients who have experienced stroke with ICAD...
December 26, 2017: JAMA Neurology
https://www.readbyqxmd.com/read/29274451/treatment-of-progressive-herpes-zoster-induced-vasculopathy-with-surgical-revascularization-effects-on-cerebral-hemodynamics
#10
Sarah K Lants, Jennifer M Watchmaker, Meher R Juttukonda, Larry T Davis, Manus J Donahue, Matthew R Fusco
BACKGROUND: Herpes zoster ophthalmicus (HZO) is caused by the reactivation of the herpes simplex virus in the trigeminal nerve. HZO-initiated cerebral vasculopathy is well-characterized, however there are no documented cases that report the efficacy of surgical revascularization for improving cerebral hemodynamics following progressive HZO-induced vasculopathy. We present a case where quantitative anatomical and hemodynamic imaging were performed longitudinally before and after surgical revascularization in a patient with HZO and vasculopathic changes...
December 20, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29260015/evolution-into-moyamoya-disease-in-an-infant-with-internal-carotid-artery-aneurysms
#11
Ryosuke Tanaka, Satoru Takahashi, Satomi Okano, Akie Okayama, Nao Suzuki, Shigeo Kure, Hiroshi Azuma
Introduction: Moyamoya disease (MMD) is characterized by progressive stenosis and occlusion in the terminal portion of both internal carotid arteries (ICAs) and the formation of an abnormal vascular network. Because of the fragile structure of the collateral vessels, MMD is frequently accompanied by intracranial aneurysms that are mainly located within the abnormal basal network or the circle of Willis. However, the association between MMD and aneurysms of the ICAs has never been reported previously...
March 2017: ENeurologicalSci
https://www.readbyqxmd.com/read/29245288/elevated-serum-lipoprotein-a-as-a-risk-factor-for-combined-intracranial-and-extracranial-artery-stenosis-in-a-child-with-arterial-ischemic-stroke-a-case-report
#12
Ji Yoon Han, Hyun Jeong Kim, Soyoung Shin, Joonhong Park, In Goo Lee
RATIONALE: Stroke is an uncommon disease in childhood with an estimated incidence of 1 to 6 per 100,000 and stenoocclusive arteriopathy is the main risk factor of recurrent pediatric arterial ischemic stroke (AIS). Dyslipidemia may influence strongly before puberty and in late adolescence when plasma levels are naturally highest. PATIENT CONCERNS: An 11-year-old male presented with acute onset seizure, a drowsy mentality, and right hemiplegia. DIAGNOSES: Magnetic resonance (MR) angiogram demonstrated occlusion of distal basilar artery and left vertebral arteries...
December 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29240063/-simultaneous-operation-in-a-patient-with-stenosis-of-the-extracranial-portion-and-an-intracranial-aneurysm-of-the-internal-carotid-artery
#13
A N Kazantsev, R S Tarasov, A I Anufriev, N N Burkov, A R Shabaev, E V Ruban
Presented herein is a clinical case report concerning surgical treatment of a patient with a rare combination of two pathologies, i. e., a haemodynamically significant stenosis of the extracranial portion and a sacciform aneurysm of the communicative portion of the right internal carotid artery on the background of multifocal atherosclerosis. The patient underwent a simultaneous operation consisting in clipping of the sacciform arterial aneurysm of the communicative portion of the right internal carotid artery and carotid endarterectomy on the right...
2017: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
https://www.readbyqxmd.com/read/29224743/clinical-study-of-intracranial-and-extracranial-atherosclerotic-stenosis-in-spontaneous-intracerebral-hemorrhage-patients
#14
Chun-Yang Zhang, Shi-Ren Huang, Si-Yang Wang, Lei Shen, Ben-Qiang Deng
BACKGROUND AND PURPOSE: Nowadays, researchers had begun to focus on the use of antiplatelet and statins in patients with spontaneous intracerebral hemorrhage (sICH), but atherosclerosis treatment remains uncertain in these patients. We aimed to investigate the incidence and characteristics of intracranial and extracranial atherosclerotic stenosis in these patients and analyze its related risk factors. METHODS: Intracranial and extracranial arteries of consecutive patients with sICH were studied retrospectively with computed tomography angiography of head and neck...
December 8, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29220356/color-doppler-ultrasonography-as-an-alternative-tool-for-postoperative-evaluation-of-collaterals-after-indirect-revascularization-surgery-in-moyamoya-disease
#15
Shin-Joe Yeh, Sung-Chun Tang, Li-Kai Tsai, Chung-Wei Lee, Ya-Fang Chen, Hon-Man Liu, Shih-Hung Yang, Meng-Fai Kuo, Jiann-Shing Jeng
The cerebral hypoperfusion caused by chronic progressive stenosis or occlusion of intracranial arteries in moyamoya disease can be treated by direct bypass or indirect revascularization procedures. The extent of collaterals from the external carotid artery (ECA) after indirect revascularization surgery is the key point of angiographic follow-up, and the invasiveness of angiography impelled us to investigate the role of ultrasonography in the evaluation of collaterals. We hypothesized that the collaterals shown on angiography might produce corresponding hemodynamic changes in color Doppler ultrasonography...
2017: PloS One
https://www.readbyqxmd.com/read/29215168/decreased-signal-intensity-ratio-on-mra-reflects-misery-perfusion-on-spect-in-patients-with-intracranial-stenosis
#16
Masatomo Miura, Makoto Nakajima, Akiko Fujimoto, Shinya Shiraishi, David S Liebeskind, Yukio Ando
BACKGROUND AND PURPOSE: Acetazolamide reactivity on 123 I-IMP SPECT is used to detect misery perfusion due to intracranial atherosclerosis. Noninvasive fractional flow assessed by signal intensity ratio (SIR) on time of flight-magnetic resonance angiography (TOF-MRA) might offer a feasible alternative to identify high-risk intracranial stenosis. METHODS: Data from consecutive patients with unilateral middle cerebral artery (MCA) stenosis who underwent both TOF-MRA and acetazolamide reactivity on 123 I-IMP SPECT were retrospectively analyzed...
December 7, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/29208850/carotid-artery-stenosis-contralateral-to-acute-tandem-occlusion-an-independent-predictor-of-poor-clinical-outcome-after-mechanical-thrombectomy-with-concomitant-carotid-artery-stenting
#17
Volker Maus, Daniel Behme, Jan Borggrefe, Christoph Kabbasch, Fatih Seker, Cicek Hüseyin, Utako Birgit Barnikol, Leonard Leong Litt Yeo, Patrick Brouwer, Michael Söderman, Markus Möhlenbruch, Marios Nikos Psychogios, Thomas Liebig, Christian Dohmen, Gereon Rudolf Fink, Anastasios Mpotsaris
BACKGROUND AND PURPOSE: Cerebral ischemic strokes due to extra-/intracranial tandem occlusions (TO) of the anterior circulation are responsible for causing mechanical thrombectomy (MT). The impact of concomitant contralateral carotid stenosis (CCS) upon outcome remains unclear in this stroke subtype. METHODS: Retrospective analysis of prospectively collected data of 4 international stroke centers between 2011 and 2017. One hundred ninety-seven consecutive patients with anterior TO were treated with MT and acute carotid artery stenting (CAS)...
November 24, 2017: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/29203731/mechanical-thrombectomy-and-rescue-therapy-for-intracranial-large-artery-occlusion-with-underlying-atherosclerosis
#18
BaiXue Jia, Lei Feng, David S Liebeskind, Xiaochuan Huo, Feng Gao, Ning Ma, Dapeng Mo, Xiaoling Liao, Chunjuan Wang, Xingquan Zhao, Yuesong Pan, Hao Li, Liping Liu, Yilong Wang, Yongjun Wang, Zhong-Rong Miao
OBJECTIVE: To investigate the safety and efficacy of mechanical thrombectomy plus rescue therapy for intracranial large artery occlusion (ILAO) with underlying intracranial atherosclerosis (ICAS). METHODS: Patients enrolled in the intervention group of EAST (Endovascular Therapy for Acute ischemic Stroke Trial) were analyzed. For underlying ICAS identified during the stent retrieval procedure, rescue treatment was required for those with (1) a degree of arterial stenosis >70% or (2) any degree of arterial with blood flow impairment or (3) evidence of re-occlusion...
December 4, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29193196/extracranial-and-intracranial-ultrasonographic-findings-in-posterior-circulation-infarction
#19
Hsin-Yi Chi, Chung-Fu Hsu, An-Chih Chen, Chun-Hung Su, Han-Hwa Hu, Wen-Mei Fu
OBJECTIVES: Patients with posterior circulation infarction are at higher risk of early recurrent stroke, especially those with vertebrobasilar stenosis or hypoplasia. The clinical presentations of this condition vary over a broad range, making diagnosis and treatment a challenge. Hemodynamic changes and stenosis detected by ultrasonography (US) are sensitive and important indicators for further evaluation. In this study, we correlated extracranial and intracranial US characteristics with brain magnetic resonance imaging (MRI) in patients with posterior circulation infarction...
November 30, 2017: Journal of Ultrasound in Medicine: Official Journal of the American Institute of Ultrasound in Medicine
https://www.readbyqxmd.com/read/29191476/the-association-between-serum-uric-acid-and-asymptomatic-intracranial-arterial-stenosis-in-middle-aged-koreans
#20
J K Ahn, J Hwang, J H Hwang, W T Yoon, P W Chung, S Ryu
BACKGROUND AND AIMS: Intracranial arterial stenosis (ICAS) is one of the most common causes of stroke, especially in Asians. Hyperuricemia has been associated with an increased risk of comorbidities such as metabolic syndrome or cardiovascular diseases. However, there are few studies focusing on the association between serum uric acid (SUA) levels and asymptomatic ICAS. The aim of this study was to explore the association between SUA and the prevalence of ICAS in middle-aged Korean health screening examinees...
October 27, 2017: Nutrition, Metabolism, and Cardiovascular Diseases: NMCD
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