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Cerebral artery anatomy

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https://www.readbyqxmd.com/read/28093693/a-simple-post-mortem-room-angiography-method-for-the-investigation-of-traumatic-basal-subarachnoid-hemorrhage
#1
Christopher P Johnson, Mike Murphy, George A Johnson, Stephen M Wills, Jonathan E Medcalf
Identifying the site of vascular bleeding in fatal cases of traumatic basal subarachnoid hemorrhage (TBSAH) is important, but can be very difficult to achieve when there is extensive blood clot in the posterior cranial fossa. Post mortem angiography in these circumstances has been reported previously but with mixed results, and is rarely used in current practice within the United Kingdom. We have developed a simple and effective post mortem angiography method, using fluoroscopy and clear modern contrast medium, suitable for use in the autopsy room...
January 17, 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28089839/maxillary-artery-to-middle-cerebral-artery-bypass-a-novel-technique-for-exposure-of-the-maxillary-artery
#2
Kaan Yagmurlu, M Yashar S Kalani, Nikolay L Martirosyan, Sam Safavi-Abbasi, Evgenii Belykh, Avra S Laarakker, Peter Nakaji, Joseph M Zabramski, Mark C Preul, Robert F Spetzler
OBJECTIVES: Define the maxillary artery (MaxA) anatomy and present a novel technique for exposing and preparing this vessel as a bypass donor. METHODS: Cadaveric and radiological studies were used to define the MaxA anatomy and illustrate a novel method for harvesting and preparing it for extracranial-to-intracranial bypass. RESULTS: The MaxA runs parallel to the frontal branch of the superficial temporal artery (STA) and is located on average 24...
January 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28067615/intracranial-atherosclerosis-from-anatomy-to-pathophysiology
#3
Yuehua Pu, Linfang Lan, Xinyi Leng, Lawrence Ks Wong, Liping Liu
Background Intracranial atherosclerotic stenosis is an important etiology subtype of ischemic stroke. Stenosis severity was thought to be the main reference index for clinical treatment and research. However, stenosis could not reflect the ischemia risk completely, instead the hemodynamic state across the lesion, the extent of collateral circulation, and perfusion impairment downstream the stenosis are more important. Aims We write this review aimed to summarize novel angiographic methods applied in the evaluation of functional severity of ICAS, and commented on their limitations and prospects in future research...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/27960167/intracranial-arteries-anatomy-and-collaterals
#4
David S Liebeskind, Louis R Caplan
Anatomy, physiology, and pathophysiology are inextricably linked in patients with intracranial atherosclerosis. Knowledge of abnormal or pathological conditions such as intracranial atherosclerosis stems from detailed recognition of the normal pattern of vascular anatomy. The vascular anatomy of the intracranial arteries, both at the level of the vessel wall and as a larger structure or conduit, is a reflection of physiology over time, from in utero stages through adult life. The unique characteristics of arteries at the base of the brain may help our understanding of atherosclerotic lesions that tend to afflict specific arterial segments...
2016: Frontiers of Neurology and Neuroscience
https://www.readbyqxmd.com/read/27942478/arterial-spin-labeling-perfusion-magnetic-resonance-imaging-of-non-human-primates
#5
Xiaodong Zhang, Chun-Xia Li
Non-human primates (NHPs) resemble most aspects of humans in brain physiology and anatomy and are excellent animal models for translational research in neuroscience, biomedical research and pharmaceutical development. Cerebral blood flow (CBF) offers essential physiological information of the brain to examine the abnormal functionality in NHP models with cerebral vascular diseases and neurological disorders or dementia. Arterial spin labeling (ASL) perfusion MRI techniques allow for high temporal and spatial CBF measurement and are intensively used in studies of animals and humans...
October 2016: Quantitative Imaging in Medicine and Surgery
https://www.readbyqxmd.com/read/27924799/collateral-flow-and-white-matter-disease-in-patients-with-internal-carotid-artery-occlusion
#6
Mami Ishikawa, Hitoshi Sugawara, Mutsumi Nagai, Gen Kusaka, Yuichi Tanaka, Heiji Naritaka
BACKGROUND: When an internal carotid artery (ICA) occludes, a patient may develop cerebral infarction (CI). We investigated whether CI caused by ICA occlusion (ICAO) is associated with collateral flow through the anterior and posterior communicating arteries (ACoA and PCoA). METHODS: In 100 patients with ICAO, we investigated CI and white matter disease by performing an MRI and the anatomy of the ACoA and PCoA were investigated by performing magnetic resonance angiography...
2017: European Neurology
https://www.readbyqxmd.com/read/27813463/bypass-surgery-for-complex-middle-cerebral-artery-aneurysms-an-algorithmic-approach-to-revascularization
#7
Ali Tayebi Meybodi, Wendy Huang, Arnau Benet, Olivia Kola, Michael T Lawton
OBJECT Management of complex aneurysms of the middle cerebral artery (MCA) can be challenging. Lesions not amenable to endovascular techniques or direct clipping might require a bypass procedure with aneurysm obliteration. Various bypass techniques are available, but an algorithmic approach to classifying these lesions and determining the optimal bypass strategy has not been developed. The objective of this study was to propose a comprehensive and flexible algorithm based on MCA aneurysm location for selecting the best of multiple bypass options...
November 4, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27765887/total-aortic-arch-replacement-advantages-of-varied-techniques
#8
REVIEW
Ryan C Shelstad, Justin G Reeves, Katsuhiro Yamanaka, T Brett Reece
We review the operative techniques of aortic arch replacement. Aortic arch replacement presents several formidable challenges, as it requires arresting the circulation to the body and replacement of the brachiocephalic vessels with special consideration for protecting the central nervous system. Perfusion strategies, selective antegrade cerebral perfusion, and operative graft selection are key elements in aortic arch replacement surgery. Standard approaches include the island technique, the branched graft technique, and the "Spielvogel" trifurcated graft technique-each having its own advantages...
December 2016: Seminars in Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/27689154/the-posterior-cerebral-artery-and-its-main-cortical-branches-identified-with-noninvasive-transcranial-color-coded-duplex-sonography
#9
P E Frid, S J Schreiber, O Pade, F Doepp, J Valdueza
PURPOSE: To differentiate PCA segments and cortical branches by means of transcranial color-coded duplex sonography (TCCD) and to measure flow parameters at rest and during visual stimulation. MATERIALS AND METHODS: 60 healthy subjects with a good acoustic temporal bone window were examined. The main stem of the PCA (P1, P2 and P3) and 4 main cortical branches - the anterior temporal artery (ATA), the occipital temporal artery (OTA), the parietooccipital artery (POA) and the calcarine artery (CA) - were assessed using an axial transtemporal approach...
November 2015: Ultrasound International Open
https://www.readbyqxmd.com/read/27660767/fetal-type-variants-of-the-posterior-cerebral-artery-and-concurrent-infarction-in-the-major-arterial-territories-of-the-cerebral-hemisphere
#10
Stephen L Lambert, Frank J Williams, Zhora Z Oganisyan, Lionel A Branch, Edward C Mader
Fetal-type or fetal posterior cerebral artery (FPCA) is a variant of cerebrovascular anatomy in which the distal posterior cerebral artery (PCA) territory is perfused by a branch of the internal carotid artery (ICA). In the presence of FPCA, thromboembolism in the anterior circulation may result in paradoxical PCA territory infarction with or without concomitant infarction in the territories of the middle (MCA) or the anterior (ACA) cerebral artery. We describe 2 cases of FPCA and concurrent acute infarction in the PCA and ICA territories-right PCA and MCA in Patient 1 and left PCA, MCA, and ACA in Patient 2...
July 2016: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/27593841/review-on-the-anatomy-of-the-middle-cerebral-artery-cortical-branches-branching-pattern-and-anomalies
#11
Karen Cilliers, Benedict John Page
The middle cerebral artery (MCA) covers a large part of the cerebral hemispheres and is therefore exposed during surgical intervention in this area. Aspects of cerebral branches tend to vary, different branching patterns can be described, and several anomalies can be observed. Knowledge of these variations and anomalies is important and can be helpful to neurosurgeons and clinicians. The aim of this study was to review the available literature on the cortical branches, branching pattern and anomalies of the MCA, to identify the gaps in the literature, and to fill these gaps by including the results of a pilot study...
June 16, 2016: Turkish Neurosurgery
https://www.readbyqxmd.com/read/27578527/t-microstent-assisted-coiling-in-the-management-of-ruptured-wide-necked-anterior-communicating-artery-aneurysms-choosing-between-y-x-and-t
#12
José E Cohen, Samuel Moscovici, Hosni Abu El Hassan, Omer Doron, Eyal Itshayek
Anterior communicating artery aneurysms frequently present wide necks and incorporate parent vessels. They are associated with significant variations in vascular anatomy, especially hypoplasia or aplasia of one of the proximal anterior cerebral arteries. Safe and complete endovascular occlusion of these aneurysms usually requires the assistance of complex approaches including dual stenting. We describe a technique for T-configured stent-assisted coiling in the management of ruptured wide-necked AcomA aneurysms by means of two simultaneous microsystems that allowed placement of two nitinol self-expandable Leo+ Baby stents (Balt Therapeutics, Montmorency, France) followed by coiling...
December 2016: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/27545038/-preparation-of-simulate-craniocerebral-models-via-three-dimensional-printing-technique
#13
Q Lan, A L Chen, T Zhang, Q Zhu, T Xu
OBJECTIVE: Three dimensional (3D) printing technique was used to prepare the simulate craniocerebral models, which were applied to preoperative planning and surgical simulation. METHODS: The image data was collected from PACS system. Image data of skull bone, brain tissue and tumors, cerebral arteries and aneurysms, and functional regions and relative neural tracts of the brain were extracted from thin slice scan (slice thickness 0.5 mm) of computed tomography (CT), magnetic resonance imaging (MRI, slice thickness 1mm), computed tomography angiography (CTA), and functional magnetic resonance imaging (fMRI) data, respectively...
August 9, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27496066/large-animal-canine-endovascular-ischemic-stroke-models-a-review
#14
REVIEW
Kunakorn Atchaneeyasakul, Luis Guada, Kevin Ramdas, Mitsuyoshi Watanabe, Pallab Bhattacharya, Ami P Raval, Dileep R Yavagal
BACKGROUND: Stroke is one of the leading causes of death and long-term disability worldwide. Recent exciting developments in the field with endovascular treatments have shown excellent outcomes in acute ischemic stroke. Prior to translating these treatments to human populations, a large-animal ischemic stroke model is needed. With the advent of new technologies in digital subtraction angiography, less invasive endovascular stroke models have been developed. Canines have gyrencephalic brain similar to human brain and accessible neurovascular anatomy for stroke model creation...
August 3, 2016: Brain Research Bulletin
https://www.readbyqxmd.com/read/27485046/modification-of-cerebral-vascular-anatomy-induced-by-leo-stent-placement-depending-on-the-site-of-stenting-a-series-of-102-cases
#15
Y Chau, L Mondot, M Sachet, J Gaudart, D Fontaine, M Lonjon, J Sédat
BACKGROUND AND PURPOSE: Recent studies demonstrated the capacity of stents to modify cerebral vascular anatomy. This study evaluates arterial anatomy deformation after Leo stent placement according to the stenting site and the impact on the immediate postoperative and six-month degree of aneurysmal occlusion. MATERIALS AND METHODS: A total of 102 stents were placed against the neck of aneurysms situated in the anterior cerebral circulation. Aneurysms were classified into two groups: The first was called the distal group (n = 62) and comprised aneurysms situated in the middle cerebral and anterior communicating arteries and the second was called the proximal group (n = 40) and comprised aneurysms in other sites...
December 2016: Interventional Neuroradiology
https://www.readbyqxmd.com/read/27470960/-the-causes-and-strategies-for-intraoperative-rupture-during-clipping-the-anterior-circulation-aneurysms
#16
H Y Li, H Chen, Y M Li, Y Li, X W Shi
OBJECTIVE: To investigate the causes and strategies for intraoperative rupture during clipping the anterior circulation aneurysms. METHODS: Nineteen patients with anterior circulation aneurysms ruptured during clipping, who admitted to the Department of Neurosurgery, Henan Provincial People's Hospital from November 2012 to February 2014, were enrolled. Their clinical data were analyzed retrospectively to summarize the causes and strategies for intraoperative rupture...
July 5, 2016: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/27446889/venovenous-extracorporeal-life-support-in-single-ventricle-patients-with-acute-respiratory-distress-syndrome
#17
REVIEW
Alison B Nair, Peter Oishi
There is new and growing experience with venovenous extracorporeal life support (VV ECLS) for neonatal and pediatric patients with single-ventricle physiology and acute respiratory distress syndrome (ARDS). Outcomes in this population have been defined but could be improved; survival rates in single-ventricle patients on VV ECLS for respiratory failure are slightly higher than those in single-ventricle patients on venoarterial ECLS for cardiac failure (48 vs. 32-43%), but are lower than in patients with biventricular anatomy (58-74%)...
2016: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/27437199/early-onset-of-atherosclerosis-of-the-carotid-bifurcation-in-newborn-cadavers
#18
Bahar Uslu, Yusuf Ozgur Cakmak, Ümit Sehirli, Elif Nedret Keskinoz, Erdal Cosgun, Serap Arbak, Aymelek Yalin
INTRODUCTION: The anatomy of arterial bifurcations affects blood flow and has a significant role in the development of vascular disease. Therefore, it is important to know the structural characteristics of the Common Carotid Artery (CCA) and its branches for early onset of atherosclerosis in newborns. AIM: The present study was conducted to evaluate the characteristics of CCA in newborn cadavers. MATERIALS AND METHODS: Eight carotid arteries obtained from newborn cadavers were used...
May 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27399393/113%C3%A2-initial-experience-with-an-image-guided-robotically-positioned-optical-platform-for-aneurysm-surgery
#19
Amin B Kassam, Srikant S Chakravarthi, Juanita Celix, Melanie Fukui, Jonathan Jennings, Sarika Walia, Richard A Rovin
INTRODUCTION: The conventional stereoscopic microscope (CS-m) made safe surgery for intracranial vascular pathology. Recently, an integrated image-guided robotic optical positioning system (ROVOT-m) has been released for clinical use. We undertook a benchside, cadaveric and clinical study to determine its applicability to aneurysm surgery. METHODS: Benchside measurements of field of view (FOV) and depth of field (DOF) were obtained for CS-m and ROVOT-m. Two cadavers were operated on to simulate aneurysm surgery using both CS-m and ROVOT-m...
August 2016: Neurosurgery
https://www.readbyqxmd.com/read/27395807/endovascular-treatment-of-a-complex-renal-artery-aneurysm-using-coils-and-the-pipeline-embolization-device-in-a-patient-with-a-solitary-kidney
#20
Demetri Adrahtas, Patrick Jasinski, George Koullias, David Fiorella, Apostolos K Tassiopoulos
BACKGROUND: We report a case of endovascular treatment of a complex renal artery aneurysm using the Pipeline Embolization Device, a flow diverting stent which is indicated for the treatment of large and giant cerebral aneurysms. METHODS: A forty-year-old female with medically refractory hypertension and congenital agenesis of the right kidney was found to have a 2.8-cm left superior renal artery branch aneurysm. The patient was treated successfully using the Pipeline Embolization Device (Medtronic, Irvine, CA) with coil embolization of the aneurysm and of one outflow vessel...
October 2016: Annals of Vascular Surgery
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