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Cerebral artery anatomy

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https://www.readbyqxmd.com/read/29140523/sequential-coiling-assisted-deployment-of-flow-diverter-for-treatment-of-fusiform-middle-cerebral-artery-aneurysms
#1
Abdulrahman Y Alturki, Philip G R Schmalz, Christopher S Ogilvy, Ajith J Thomas
BACKGROUND AND IMPORTANCE: Fusiform intracranial aneurysms remain challenging lesions to treat. These aneurysms have historically required bypass procedures or clip remodeling constructs for cure. Recently, endovascular specialists have reported experience with flow diversion for complex fusiform aneurysms of the vertebrobasilar system, with mixed results. Vascular anatomy for anterior circulation fusiform aneurysms may make these lesions more amenable to flow diversion and embolization procedures; however, published experience with these techniques is lacking...
November 11, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29122537/a-coil-placement-technique-to-treat-intracranial-aneurysm-with-incorporated-artery
#2
Chao-Bao Luo, Feng-Chi Chang, Chung-Jung Lin, Wan-Yuo Guo
BACKGROUND: Endovascular coil embolization is an accepted treatment option for intracranial aneurysms. However, the coiling of aneurysms with an incorporated artery (IA) poses a high risk of IA occlusion. Here we report our experience of endovascular coil placement using a technique that avoids IA occlusion in aneurysms with IAs. METHODS: Over a 6-year period, 185 patients harboring 206 intracranial aneurysms underwent endosaccular coiling. Forty-two of these patients with 45 aneurysms were treated by coil placement to avoid IAs occlusion...
November 6, 2017: Journal of the Chinese Medical Association: JCMA
https://www.readbyqxmd.com/read/29111474/the-middle-temporal-artery-surgical-anatomy-and-exposure-for-cerebral-revascularization
#3
Roberto Rodriguez Rubio, Michael T Lawton, Olivia Kola, Halima Tabani, Sonia Yousef, Ali Tayebi Meybodi, Jan-Karl Burkhardt, Ivan El-Sayed, Arnau Benet
BACKGROUND: The middle temporal artery (MTA) is the proximal medial branch of the superficial temporal artery (STA), supplying the temporalis muscle along with deep temporal arteries. Its use in vascularized flaps for reconstructive and otologic procedures has been described, yet its potential use in neurosurgery is not studied. We report a novel technique for exposing the MTA and evaluated its characteristics for extracranial-intracranial (EC-IC) cerebrovascular bypass. METHODS: After a curvilinear frontotemporal incision in 10 cadaveric specimens, the STA was dissected from distal to proximal...
October 27, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29110993/anterior-temporal-artery-to-posterior-cerebral-artery-bypass-for-revascularization-of-the-posterior-circulation-an-anatomical-study
#4
Kaan Yağmurlu, M Yashar S Kalani, Feres Chaddad-Neto, Orhun Mete Cevik, Baran Bozkurt, Evgenii Belykh, Hugo Leonardo Doria-Netto, Andrew W Grande, Mark C Preul, Robert F Spetzler
We describe a novel intracranial-to-intracranial bypass technique between the anterior temporal artery and the posterior cerebral artery for revascularization of the posterior circulation. Four formalin-fixed human heads were examined to demonstrate the detailed anatomy of the middle cerebral artery and the posterior cerebral artery, and to illustrate the step-by-step bypass procedure. The anterior temporal artery, a branch of the middle cerebral artery, can be anastomosed to the P2 segment of the posterior cerebral artery as an alternative to extracranial bypass donor segments for treatment of complex aneurysms requiring revascularization...
October 27, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29089282/safety-and-efficacy-of-the-new-micromesh-covered-stent-cguard-in-patients-undergoing-carotid-artery-stenting-early-experience-from-a-single-centre
#5
Renato Casana, Valerio Tolva, Andrea Odero, Chiara Malloggi, Aldo Paolucci, Fabio Triulzi, Vincenzo Silani
OBJECTIVE/BACKGROUND: Plaque protrusion through stent struts represents one of the principal causes of cerebral embolisation during carotid artery stenting (CAS) and the stent healing period. The aim of this study was to evaluate the safety (technical success) and efficacy (clinical success) of the CGuard stent system - a new nitinol stent covered by a closed-cell polyethylene terephthalate mesh designed to prevent embolic events. METHODS: Eighty-two consecutive patients who underwent CAS with CGuard from June 2015 were included in this study...
October 28, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29026001/understanding-a-role-for-hypoxia-in-lesion-formation-and-location-in-the-deep-and-periventricular-white-matter-in-small-vessel-disease-and-multiple-sclerosis
#6
REVIEW
Santiago Martinez Sosa, Kenneth J Smith
The deep and periventricular white matter is preferentially affected in several neurological disorders, including cerebral small vessel disease (SVD) and multiple sclerosis (MS), suggesting that common pathogenic mechanisms may be involved in this injury. Here we consider the potential pathogenic role of tissue hypoxia in lesion development, arising partly from the vascular anatomy of the affected white matter. Specifically, these regions are supplied by a sparse vasculature fed by long, narrow end arteries/arterioles that are vulnerable to oxygen desaturation if perfusion is reduced (as in SVD, MS and diabetes) or if the surrounding tissue is hypoxic (as in MS, at least)...
October 15, 2017: Clinical Science (1979-)
https://www.readbyqxmd.com/read/28976180/magnetic-particle-imaging-for-real-time-perfusion-imaging-in-acute-stroke
#7
Peter Ludewig, Nadine Gdaniec, Jan Sedlacik, Nils D Forkert, Patryk Szwargulski, Matthias Graeser, Gerhard Adam, Michael G Kaul, Kannan M Krishnan, R Matthew Ferguson, Amit P Khandhar, Piotr Walczak, Jens Fiehler, Götz Thomalla, Christian Gerloff, Tobias Knopp, Tim Magnus
The fast and accurate assessment of cerebral perfusion is fundamental for the diagnosis and successful treatment of stroke patients. Magnetic particle imaging (MPI) is a new radiation-free tomographic imaging method with a superior temporal resolution, compared to other conventional imaging methods. In addition, MPI scanners can be built as prehospital mobile devices, which require less complex infrastructure than computed tomography (CT) and magnetic resonance imaging (MRI). With these advantages, MPI could accelerate the stroke diagnosis and treatment, thereby improving outcomes...
October 24, 2017: ACS Nano
https://www.readbyqxmd.com/read/28970078/evaluation-of-cerebral-arterial-and-venous-system-in-tuberculous-meningitis
#8
Jayantee Kalita, Rajesh K Singh, Usha K Misra, Sunil Kumar
BACKGROUND: Central nervous system infection especially pyogenic results in cerebral venous sinus thrombosis. Tuberculous meningitis (TBM) although associated with infarctions but there is no comprehensive study evaluating the role of CVST contributing in infarction. PURPOSE: To evaluate cerebral arterial and venous system using MR angiography (MRA) and MR venography (MRV) in TBM, and correlate with clinical and MRI findings. MATERIALS AND METHODS: Consecutive patients with TBM were evaluated clinically and their consciousness was assessed by using Glasgow Coma scale...
September 29, 2017: Journal of Neuroradiology. Journal de Neuroradiologie
https://www.readbyqxmd.com/read/28966305/functional-vascular-anatomy-of-the-brain
#9
Michihiro Tanaka
Functional vascular anatomy is the study of anatomy in its relation to the function that figures out the normal and pathological vascularization of the brain and spinal cord. The mechanism of anatomical variations (e.g. fenestration of the basilar artery, persistent primitive trigeminal artery, and aberrant subclavian artery) can be explained according to the embryological development of the cardiovascular system. The most developmental process is common among the species of the vertebrates from the fish to the mammalian in the early phase of embryo...
October 2, 2017: Neurologia Medico-chirurgica
https://www.readbyqxmd.com/read/28949999/automatic-flow-analysis-of-digital-subtraction-angiography-using-independent-component-analysis-in-patients-with-carotid-stenosis
#10
Han-Jui Lee, Jia-Sheng Hong, Chung-Jung Lin, Yi-Hsuan Kao, Feng-Chi Chang, Chao-Bao Luo, Wei-Fa Chu
PURPOSE: Current time-density curve analysis of digital subtraction angiography (DSA) provides intravascular flow information but requires manual vasculature selection. We developed an angiographic marker that represents cerebral perfusion by using automatic independent component analysis. MATERIALS AND METHODS: We retrospectively analyzed the data of 44 patients with unilateral carotid stenosis higher than 70% according to North American Symptomatic Carotid Endarterectomy Trial criteria...
2017: PloS One
https://www.readbyqxmd.com/read/28948536/anatomical-variations-of-the-recurrent-artery-of-heubner-number-origin-and-course
#11
Wakoto Matsuda, Takahiro Sonomura, Satoru Honma, Sachi Ohno, Tetsuya Goto, Shuichi Hirai, Masahiro Itoh, Yoshiko Honda, Hiroki Fujieda, Jun Udagawa, Shuichi Ueda
The clinical anatomy of the recurrent artery of Heubner (RAH) was examined, focusing on its number, origin, and course, in a large number of brain specimens. We studied 724 RAH in total from 357 brain specimens (714 hemispheres). In 98.74 % of 714 cases there were one or more RAHs, while it was absent in 1.26 % of cases. There was a single RAH in 96.22 % of cases, double in 2.38 % of cases, and triple in 0.14 % of cases. In this study, three origin types of the RAH were defined. We defined A1 and A2 segment of the anterior cerebral artery (ACA) as the artery from the origin of the ACA to the junction of the anterior communicating artery (AComA) and the artery from the junction of the AComA to the anterior border of the corpus callosum, respectively...
September 25, 2017: Anatomical Science International
https://www.readbyqxmd.com/read/28945289/anomalies-and-normal-variants-of-the-cerebral-arterial-supply-a-comprehensive-pictorial-review-with-a-proposed-workflow-for-classification-and-significance
#12
REVIEW
Arsany Hakim, Jan Gralla, Christoph Rozeik, Pasquale Mordasini, Lars Leidolt, Eike Piechowiak, Christoph Ozdoba, Marwan El-Koussy
Cerebral arteries may exhibit a wide range of variation from normal anatomy, which can be incidentally discovered during imaging. Knowledge of such variants is crucial to differentiate them from pathologies, to understand the etiology of certain pathologies directly related to a vascular variant, and to depict the changes in collateral circulation in patients with certain variants. Detection of particular variants may lead to the discovery of other nonvascular or vascular anomalies, especially aneurysms, and may also affect planning of endovascular or neurosurgical interventions...
September 25, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/28944705/influence-of-carotid-tortuosity-on-internal-carotid-artery-access-time-in-the-treatment-of-acute-ischemic-stroke
#13
Z O Kaymaz, O Nikoubashman, M A Brockmann, M Wiesmann, C Brockmann
Purpose Carotid artery anatomy is thought to influence internal carotid artery access time (ICA-AT) in patients requiring mechanical thrombectomy for acute ischemic stroke. This study investigates the association between ICA-AT and carotid anatomy. Material and methods Computed tomography angiography (CTA) data of 76 consecutive patients presenting with acute ischemic stroke requiring mechanical thrombectomy for middle cerebral artery or carotid T occlusion were evaluated. The supraaortic extracranial vasculature was analyzed regarding take-off angles and curvature of the affected side...
December 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28943421/rotational-vertebral-artery-dissection-secondary-to-anomalous-entrance-into-transverse-foramen
#14
Stephen A Johnson, Andrew F Ducruet, Jonathan B Bellotte, Charles E Romero, Robert M Friedlander
BACKGROUND: Rotational vertebral artery occlusion is a rare syndrome characterized by vertebrobasilar insufficiency secondary to position-dependent occlusion of the vertebral artery. Most cases reported in the literature have been attributed to osteophytic compression, either from the occipital condyle or within the transverse foramen. However, vertebral artery dissection secondary to motion in the setting of anomalous anatomy has not been reported. CASE DESCRIPTION: To the authors' knowledge, rotational vertebral artery occlusion and dissection secondary to anomalous entrance into the transverse foramen have never been reported...
September 21, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28927909/monolateral-pterional-keyhole-approaches-to-bilateral-cerebral-aneurysms-anatomy-and-clinical-application
#15
Liang-Hong Yu, Huang-Cheng Shang-Guan, Guo-Rong Chen, Shu-Fa Zheng, Yuan-Xiang Lin, Zhang-Ya Lin, Pei-Sen Yao, De-Zhi Kang
OBJECTIVE: To study the anatomy and clinical application of monolateral pterional keyhole approach for treating bilateral cerebral aneurysms. MATHERIAL AND METHODS: 12 alcohol-preserved cadaveric heads underwent right pterional keyhole approaches for management of simulative contralateral aneurysms. Length of the contralateral middle cerebral artery (MCA), distal internal carotid artery (DICA), anterior cerebral artery (ACA), and ophthalmic segment of internal carotid artery (OICA) was recorded...
September 16, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28919562/operative-management-of-distal-anterior-cerebral-artery-aneurysms-through-a-mini-anterior-interhemispheric-approach
#16
Alejandro Monroy, Edgar Nathal, Albert L Rhoton
BACKGROUND: Distal anterior cerebral artery (DACA) aneurysms, also referred to as pericallosal artery aneurysms, are present in 1.5 to 9% of all intracranial aneurysms. This study aims to describe the importance of the microsurgical anatomy of the DACA and demonstrate the surgical nuances for handling DACA aneurysms, with a minimally invasive surgical technique METHODS: We retrospectively and descriptively analyzed a series of aneurysm cases performed at the National Institute of Neurology and Neurosurgery-Mexico City...
September 14, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28866349/individual-differences-in-regional-cortical-volumes-across-the-life-span-are-associated-with-regional-optical-measures-of-arterial-elasticity
#17
Antonio M Chiarelli, Mark A Fletcher, Chin Hong Tan, Kathy A Low, Edward L Maclin, Benjamin Zimmerman, Tania Kong, Alexander Gorsuch, Gabriele Gratton, Monica Fabiani
Aging is often accompanied by changes in brain anatomy and cerebrovascular health. However, the specific relationship between declines in regional cortical volumes and loss of cerebral arterial elasticity is less clear, as only global or very localized estimates of cerebrovascular health have been available. Here we employed a novel tomographic optical method (pulse-DOT) to derive local estimates of cerebral arterial elasticity and compared regional volumetric estimates (obtained with FreeSurfer) with optical arterial elasticity estimates from the same regions in 47 healthy adults (aged 18-75)...
September 1, 2017: NeuroImage
https://www.readbyqxmd.com/read/28844548/direct-common-carotid-artery-puncture-for-endovascular-treatment-of-acute-large-vessel-ischemic-stroke-in-a-patient-with-aortic-coarctation
#18
Adam D Roche, Blathnaid Murphy, Niamh Adams, Richard Sheahan, Paul Brennan, Seamus Looby
Coarctation of the aorta is a condition that typically presents in childhood as a congenital malformation. This report describes a case of acute right middle cerebral artery ischemic stroke, which occurred in a patient with aortic coarctation that remained undiagnosed until her eighth decade. Complex anatomical variant presented a significant technical challenge in establishing endovascular access for mechanical thrombectomy using standard femoral, brachial, or radial artery approaches. Direct right common carotid puncture was performed successfully with subsequent reperfusion and full neurological recovery...
November 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/28838118/efficacy-of-endoscopic-fluorescein-video-angiography-in-aneurysm-surgery-novel-and-innovative-assessment-of-vascular-blood-flow-in-the-dead-angles-of-the-microscope
#19
Koji Hashimoto, Hiroyuki Kinouchi, Hideyuki Yoshioka, Kazuya Kanemaru, Masakazu Ogiwara, Takashi Yagi, Takuma Wakai, Yuichiro Fukumoto
BACKGROUND: In aneurysm surgery, assessment of the blood flow around the aneurysm is crucial. Recently, intraoperative fluorescence video angiography has been widely adopted for this purpose. However, the observation field of this procedure is limited to the microscopic view, and it is difficult to visualize blood flow obscured by the skull base anatomy, parent arteries, and aneurysm. OBJECTIVE: To demonstrate the efficacy of a new small-caliber endoscopic fluorescence video angiography system employing sodium fluorescein in aneurysm surgery for the first time...
August 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28826714/internal-maxillary-artery-to-upper-posterior-circulation-bypass-using-a-superficial-temporal-artery-graft-surgical-anatomy-and-feasibility-assessment
#20
Ali Tayebi Meybodi, Michael T Lawton, Roberto Rodriguez Rubio, Sonia Yousef, Xiaoming Guo, Xuequan Feng, Arnau Benet
BACKGROUND: Revascularization of the upper posterior circulation (UPC), including the superior cerebellar artery (SCA) and posterior cerebral artery (PCA), may be necessary as part of the surgical treatment of complex UPC aneurysms or vertebrobasilar insufficiency. The existing bypass options have relative advantages and disadvantages. However, the use of a superficial temporal artery graft (STAg) in a bypass from the internal maxillary artery (IMA) to the UPC has not been previously assessed...
November 2017: World Neurosurgery
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