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Cerebral artery anatomy

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https://www.readbyqxmd.com/read/29775150/computer-aided-analysis-of-middle-cerebral-artery-tortuosity-association-with-aneurysm-development
#1
Kornelia M Kliś, Roger M Krzyżewski, Borys M Kwinta, Krzysztof Stachura, Marek Moskała, Krzysztof A Tomaszewski
OBJECTIVE Blood vessel tortuosity may play an important role in the development of vessel abnormalities such as aneurysms. Currently, however, there are no studies analyzing the impact of brain blood vessel tortuosity on the risk of aneurysm formation. Therefore, the authors performed a computer-aided analysis of middle cerebral artery (MCA) tortuosity, especially among patients diagnosed with MCA aneurysms. METHODS Anatomy of the MCAs of 54 patients with unruptured MCA aneurysms was retrospectively analyzed, as was that of 54 sex-, age-, and vessel side-matched control patients without MCA aneurysms...
May 18, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29768961/a-rare-case-of-ruptured-aneurysm-of-the-paramedian-artery-of-percheron
#2
Gianvincenzo Sparacia, Francesco Agnello, Massimo Midiri, Alberto Iaia
Introduction The artery of Percheron is a rare anatomic variant supplying bilateral medial thalamic nuclei and a variable portion of the rostral part of midbrain. Case report A 48-year-old female with massive subarachnoid hemorrhage due to a ruptured aneurysm of the paramedian artery of Percheron presented to the emergency room. Because of significant risk of recurrent intracranial hemorrhage, it was decided to proceed with endovascular embolization of the aneurysm. The patient was ultimately sent to a rehabilitation center and her presenting neurologic deficits showed significant improvements in the weeks following endovascular embolization treatment...
January 1, 2018: Interventional Neuroradiology
https://www.readbyqxmd.com/read/29729462/interdisciplinary-prevention-and-management-of-wound-related-complications-in-extracranial-to-intracranial-bypass-surgery
#3
Rintaro Yokoyama, Takeshi Mikami, Ryo Ukai, Katsuya Komatsu, Yusuke Kimura, Hime Suzuki, Toshimi Honma, Toru Hirano, Tamotsu Saito, Ken Yamashita, Takatoshi Yotsuyanagi, Kiyohiro Houkin, Nobuhiro Mikuni
Extracranial-to-intracranial (EC-IC) bypass surgery may be necessary in patients with moyamoya disease and other ischemic conditions. However, there is a potential risk of wound-related complications in some cases. In this study, we report our approach to prevention of wound-related complications in EC-IC bypass, and technical consideration and pitfalls of surgery are discussed. This study included 89 patients with ischemic-onset moyamoya disease and atherosclerotic disease, who underwent 108 superficial temporal artery (STA)-to-middle cerebral artery bypass procedures...
May 2, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29719557/stent-reconstruction-of-carotid-tonsillar-loop-dissection-using-telescoping-peripheral-stents
#4
Benjamin M Zussman, Bradley A Gross, William J Ares, Cynthia L Kenmuir, Gregory M Weiner, David M Panczykowski, Ashutosh P Jadhav, Tudor G Jovin, Brian T Jankowitz
Background: Endovascular treatment options for internal carotid artery (ICA) dissection with tandem intracranial occlusion are evolving. We report 2 cases of stent reconstruction of carotid loop dissections. Methods: Two patients with symptomatic ICA dissections of true 360° tonsillar loops and tandem intracranial occlusions were treated with manual aspiration thrombectomy (MAT) and telescoping Zilver self-expanding peripheral stents. Patient demographics, clinical presentations, endovascular techniques, and clinical outcomes were reviewed...
April 2018: Interventional Neurology
https://www.readbyqxmd.com/read/29716803/pericallosal-aneurysm-coiling-with-a-hubbed-167-cm-0-013%C3%A2-headway-duo-via-a-transradial-approach
#5
Bradley A Gross, Cynthia L Kenmuir, William J Ares, Ashutosh P Jadhav, Tudor G Jovin, Brian T Jankowitz
Cerebral aneurysms in patients with extreme proximal tortuosity may contraindicate endovascular therapy as a result of both the approach and an inability to navigate a coil-compatible microcatheter into the aneurysm due to microcatheter length. We present a 72 year-old male with multiple medical comorbidities admitted with a grade 3, ruptured pericallosal aneurysm. Aortoiliac disease contraindicated a transfemoral approach and thus a 6 French 105 cm guide catheter was advanced through a 6 French short radial sheath into a bovine left common carotid artery...
April 28, 2018: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/29709754/incidentally-found-double-aortic-arch-while-treating-a-posterior-inferior-cerebellar-artery-aneurysm-conversion-from-femoral-to-radial-artery-access
#6
Mayank Patel, Joe Iwananga, Josh Bentley, Bill H Wang, Akil Patel, R Shane Tubbs, Steve Monteith
Asymptomatic double aortic arches are a unique occurrence. An incidental finding of a double aortic arch in an elderly male was discovered during work up of a transient ischemic attack. The following case presentation details an effective treatment approach in cerebrovascular stenting in a patient with variant aortic arch anatomy. The initial diagnostic cerebral angiogram was performed via trans-femoral approach and was quite challenging. Faced with challenging anatomy, the radial artery approach is a viable option when navigating into the cerebrovascular anatomy for stenting when proximal variants such as a double aortic arch are identified...
April 27, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29701400/endovascular-treatment-of-carotid-blowout-syndrome
#7
Roger Rodrigues, João Costa, Gabriel Anacleto, Diogo Roriz, Óscar Gonçalves
INTRODUCTION: Carotid blowout syndrome (CBS) is a life threatening complication associated with head and neck cancers (HNC) and its treatment. The mortality rate was reported to range from 3% to over 50% in the literature. Direct surgical repair of the ruptured internal carotid artery is often not technically possible due to the difficult anatomy and underlying poor co-morbid status. Endovascular techniques such as coil embolization and stent grafting offer an alternative to surgical ligation with better patient outcomes...
July 2017: Revista Portuguesa de Cirurgia Cardio-torácica e Vascular
https://www.readbyqxmd.com/read/29693258/microvascular-anatomy-of-the-brain-of-the-adult-pipid-frog-xenopus-laevis-daudin-a-scanning-electron-microscopic-study-of-vascular-corrosion-casts
#8
Alois Lametschwandtner, Bernd Minnich
To demonstrate the 3D microvascular anatomy of the brain of the model organism Xenopus laevis Daudin scanning electron microscopy of vascular corrosion casts was correlated with light microscopy of stained 7 µm thick serial tissues sections. Results showed that supplying arteries descended from the leptomeningeal surface without remarkable branchings straight to the subventricular zone where they branched and capillarized. Capillaries showed few H- and/or Y-shaped anastomoses during their centrifugal course toward the leptomeningeal surface where they drained into cerebral venules and veins...
April 25, 2018: Journal of Morphology
https://www.readbyqxmd.com/read/29691787/the-role-of-circle-of-willis-anatomy-variations-in-cardio-embolic-stroke-a-patient-specific-simulation-based-study
#9
Debanjan Mukherjee, Neel D Jani, Jared Narvid, Shawn C Shadden
We describe a patient-specific simulation based investigation on the role of Circle of Willis anatomy in cardioembolic stroke. Our simulation framework consists of medical image-driven modeling of patient anatomy including the Circle, 3D blood flow simulation through patient vasculature, embolus transport modeling using a discrete particle dynamics technique, and a sampling based approach to incorporate parametric variations. A total of 24 (four patients and six Circle anatomies including the complete Circle) models were considered, with cardiogenic emboli of varying sizes and compositions released virtually and tracked to compute distribution to the brain...
April 24, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29675634/investigation-of-circle-of-willis-variants-and-hemodynamic-parameters-in-twins-using-transcranial-color-coded-doppler-sonography
#10
Bianka Forgó, Ádám Domonkos Tárnoki, Dávid László Tárnoki, Levente Littvay, Corrado Fagnani, Maria Antonietta Stazi, Giorgio Meneghetti, Emanuela Medda, Filippo Farina, Claudio Baracchini
Morphological and hemodynamic variations of the circle of Willis (CW) may have an important impact on cerebrovascular events. However, the environmental and genetic influence remains unclear. For this reason we studied the variations and hemodynamic parameters of the CW in twins using transcranial color-coded sonography (TCCS). Sixty-four twins, 19 monozygotic (MZ) and 13 dizygotic (DZ) pairs from the Italian Twin Registry (average age 45.0 ± 13.7 years) underwent TCCS and risk factor assessment. We examined CW morphology and recorded peak systolic velocity (PSV), end-diastolic velocity (EDV) and pulsatility index (PI)...
April 19, 2018: International Journal of Cardiovascular Imaging
https://www.readbyqxmd.com/read/29650781/anatomic-and-angiographic-analyses-of-ophthalmic-artery-collaterals-in-moyamoya-disease
#11
T Robert, G Cicciò, P Sylvestre, A Chiappini, A G Weil, S Smajda, C Chaalala, R Blanc, M Reinert, M Piotin, M W Bojanowski
BACKGROUND AND PURPOSE: Moyamoya disease is a progressive neurovascular pathology defined by steno-occlusive disease of the distal internal carotid artery and associated with the development of compensatory vascular collaterals. The etiology and exact anatomy of vascular collaterals have not been extensively studied. The aim of this study was to describe the anatomy of collaterals developed between the ophthalmic artery and the anterior cerebral artery in a Moyamoya population. MATERIALS AND METHODS: All patients treated for Moyamoya disease from 2004 to 2016 in 4 neurosurgical centers with available cerebral digital subtraction angiography were included...
April 12, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29628945/balloon-assisted-cannulation-for-difficult-anterior-cerebral-artery-access
#12
Varun Naragum, Mohamad AbdalKader, Thanh N Nguyen, Alexander Norbash
The anterior communicating artery is a common location for intracranial aneurysms. Compared to surgical clipping, endovascular coiling has been shown to improve outcomes for patients with ruptured aneurysms and we have seen a paradigm shift favoring this technique for treating aneurysms. Access to the anterior cerebral artery can be challenging, especially in patients with tortuous anatomy or subarachnoid hemorrhage or in patients presenting with vasospasm. We present a technique for cannulating the anterior cerebral artery using a balloon inflated in the proximal middle cerebral artery as a rebound surface...
February 2018: Interventional Neurology
https://www.readbyqxmd.com/read/29561225/cerebrovascular-blood-oxygenation-level-dependent-pulsatility-at-baseline-and-following-acute-exercise-among-healthy-adolescents
#13
Athena E Theyers, Benjamin I Goldstein, Arron Ws Metcalfe, Andrew D Robertson, Bradley J MacIntosh
Arterial stiffness is linked to cerebral small vessel damage and neurodegeneration, but barriers to accessing deep cerebrovascular anatomy limit our ability to assess the brain. This study describes an adaptation of a cardiac-related scrubbing method as a means of generating blood oxygenation level-dependent pulsatility maps based on the cardiac cycle. We examine BOLD pulsatility at rest, based on the non-parametric deviation from null metric, as well as changes following acute physiological stress from 20 min of moderate-intensity cycling in 45 healthy adolescents...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29555398/ipsilateral-ptosis-and-contralateral-ataxic-hemiparesis-as-initial-symptoms-of-combined-tuberothalamic-and-paramedian-artery-infarction
#14
Yi Liu, Jianwen Lin, Lin Zhang, Anand Karthik Sarma, Hongling Zhao, Cui Wang, Jing Bing, Xin Pan, Xunming Ji, Suping Wang
Thalamic infarcts, accounting for approximately 14% of lacunar infarcts, exhibit varied clinical manifestations due to complex anatomy of nuclei and varying blood supply. Pure and combined types of thalamic infarctions have been summarized in some paper, but information of cerebral angiography was not mentioned. Here we report a rare case of combined tuberothalamic and paramedian artery occlusion presenting with ipsilateral ptosis and contralateral ataxic hemiparesis.
March 16, 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29530689/circle-of-willis-collateral-flow-in-carotid-artery-occlusion-is-depicted-by-4d-cta
#15
Midas Meijs, Frank-Erik de Leeuw, Hieronymus D Boogaarts, Rashindra Manniesing, Frederick Jan Anton Meijer
BACKGROUND: In case of carotid artery occlusion, the risk and extent of ischemic cerebral damage are highly dependent on the pathways of collateral flow including the anatomy of the circle of Willis. In this report, cases are presented to illustrate that 4-dimensional computed tomography angiography (4D-CTA) can be considered as a noninvasive alternative to digital subtraction angiography for the evaluation of circle of Willis collateral flow. CASE DESCRIPTION: Five patients with unilateral internal carotid artery (ICA) occlusion underwent 4D-CTA for the evaluation of intracranial hemodynamics...
March 9, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29515376/cerebral-artery-diameter-in-inbred-mice-varies-as-a-function-of-strain
#16
Baogang Qian, Robert F Rudy, Tianxi Cai, Rose Du
Many strains of mice are utilized in mouse models of cerebrovascular diseases. Variations in vascular anatomy between these strains has been documented and may influence the phenotype in stroke models. To address inter-strain variations in the circle of Willis anatomy, the diameters of internal carotid, posterior communicating, anterior cerebral, and middle cerebral arteries in 144 mice from 32 inbred strains were measured. Arterial diameters were analyzed as a function of animal weight, age, and strain. Variations in the structure of the circle of Willis across strains were observed and noted...
2018: Frontiers in Neuroanatomy
https://www.readbyqxmd.com/read/29500892/anatomy-of-the-feeding-arteries-of-the-cerebral-arteriovenous-malformations
#17
Biljana Milatović, Jovica Saponjski, Haris Huseinagić, Mirza Moranjkić, Svetlana Milošević Medenica, Ivan Marinković, Igor Nikolić, Slobodan Marinkovic
BACKGROUND: Identification and anatomic features of the feeding arteries of the arteriovenous malformations (AVMs) is very important due to neurologic, radiologic, and surgical reasons. MATERIALS AND METHODS: Seventy-seven patients with AVMs were examined by using a digital subtraction angiographic (DSA) and computerized tomographic (CT) examination, including 3D reconstruction of the brain vessels. In addition, the arteries of 4 human brain stems and 8 cerebral hemispheres were microdissected...
March 3, 2018: Folia Morphologica (Warsz)
https://www.readbyqxmd.com/read/29497785/transcervical-access-via-direct-neck-exposure-for-neurointerventional-procedures-in-the-hybrid-angiosuite
#18
Jong Young Lee, Jong-Hwa Park, Hong Jun Jeon, Dae Young Yoon, Seoung Woo Park, Byung Moon Cho
PURPOSE: A complicated course of the femoral route for neurointervention can prevent approaching the target. Thus, we determined whether transcervical access in the hybrid angiosuite is applicable and beneficial in real practice. METHODS: From January 2014 to March 2017, this approach was used in 17 of 453 (3.75%) cases: 11 cerebral aneurysms (4 ruptured, 7 unruptured), 4 acute occlusions of the large cerebral artery, 1 proximal internal carotid artery (ICA) stenosis, and 1 direct carotid cavernous fistula (CCF)...
May 2018: Neuroradiology
https://www.readbyqxmd.com/read/29484629/the-geometry-of-the-circle-of-willis-anatomical-variants-as-a-potential-cerebrovascular-risk-factor
#19
Raluca Pascalau, Vlad Adrian Padurean, Dana BARTOș, Adrian BARTOș, Bianca Aurora Szabo
AIM: Anatomical variants of the circle of Willis are diverse and frequent and, although they are not a direct cause of cerebrovascular diseases, they are risk factors for impaired collateral perfusion and wall shear stress. This study aimed to correlate the anatomical variants with their effects on the hemodynamic and geometrical parameters responsible for the pathogenesis of neurological diseases. MATERIAL AND METHODS: The circle of Willis and the proximal segments of the main arteries were dissected and measured on ten formalin-fixed human brains...
February 7, 2018: Turkish Neurosurgery
https://www.readbyqxmd.com/read/29460331/clinical-and-neuroimaging-findings-in-thalamic-territory-infarctions-a-review
#20
REVIEW
Shuo Li, Yogesh Kumar, Nishant Gupta, Ahmed Abdelbaki, Harpreet Sahwney, Anil Kumar, Manisha Mangla, Rajiv Mangla
The thalamus is a part of the diencephalon, containing numerous connections between the forebrain and subcortical structures. It serves an important function as a relay center between the cerebral cortex and the subcortical regions, particularly with sensory information. The thalamus also plays a major role in regulating arousal and the levels of awareness. Distinct vascular distribution of the thalamus give rises to different syndromic presentation of thalamic nuclei infarcts. The clinical records and available imaging studies of patients with confirmed thalamic territory infarcts on magnetic resonance imaging (MRI) at the University Hospital of Rochester were reviewed and analyzed...
February 20, 2018: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
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