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Anterior cerebral artery

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https://www.readbyqxmd.com/read/29218385/bilateral-carotid-anterior-cerebral-artery-anastomoses-associated-with-bilateral-ophthalmic-arteries-arising-from-the-anastomotic-arteries-diagnosed-by-magnetic-resonance-angiography-a-case-report
#1
Akira Uchino, Naoko Saito, Norio Tanahashi
Rarely, the anterior cerebral artery (ACA) arises from the ophthalmic segment of the internal carotid artery, a condition described as carotid-ACA anastomosis or infraoptic course of the ACA that generally demonstrates right-sided predominance. We diagnosed a case of bilateral anastomoses of the carotid and ACA vessels in which bilateral ophthalmic arteries arose from the origins of the anastomotic vessels using magnetic resonance (MR) angiography. Identification of rare arterial variations on MR angiography requires careful scrutiny of source images, and creation of partial volume-rendering images can aid visualization of detailed anatomic structures...
December 7, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/29212618/altered-cerebral-perfusion-in-infants-born-preterm-compared-with-infants-born-full-term
#2
Marine Bouyssi-Kobar, Jonathan Murnick, Marie Brossard-Racine, Taeun Chang, Eman Mahdi, Marni Jacobs, Catherine Limperopoulos
OBJECTIVES: To compare regional cerebral cortical blood flow (CBF) in infants born very preterm at term-equivalent age (TEA) and healthy newborns born full term and to examine the impact of clinical risk factors on CBF in the cohort born preterm. STUDY DESIGN: This prospective, cross-sectional study included infants born very preterm (gestational age at birth <32 weeks; birth weight <1500 g) and healthy infants born full term. Using noninvasive 3T arterial spin labeling magnetic resonance imaging, we quantified regional CBF in the cerebral cortex: sensorimotor/auditory/visual cortex, superior medial/dorsolateral prefrontal cortex, anterior cingulate cortex (ACC)/posterior cingulate cortex, insula, and lateral posterior parietal cortex, as well as in the brainstem, and deep gray matter...
November 30, 2017: Journal of Pediatrics
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
#3
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/29207882/the-modified-lateral-supraorbital-approach
#4
Umit Kocaman, Tayfun Dalbasti, Mehmet Haluk Ozer, Hakan Yilmaz, Muhammet Bahadir Yilmaz, Ibrahim Burak Atci, Servet Celik
PURPOSE: Lateral supraorbital approach is a simpler and quicker method than pterional approach. It provides a more anterior projection when compared to the pterional approach. There are some minor differences of the modified lateral supraorbital approach when compared to lateral supraorbital approach. It is directed more subfrontally and anterior than the pterional and lateral supraorbital approach. MATERIAL AND METHODS: We used modified lateral supraorbital approach in 100 cases between 2012 and 2015 in Medical Park İzmir Hospital/Turkey...
December 6, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/29203170/diameter-of-fluorescent-microspheres-determines-their-distribution-throughout-the-cortical-watershed-area-in-mice
#5
Naoki Tsukada, Masahiro Katsumata, Koichi Oki, Kazushi Minami, Takato Abe, Shinichi Takahashi, Yoshiaki Itoh, Norihiro Suzuki
A hemodynamic mechanism has long been assumed to play an important role in watershed infarction. In recent years, however, clinical evidence has indicated that an embolic mechanism is involved. The mechanism by which emboli are trapped preferentially in watershed areas remains unclear. In the present study, we developed a mouse embolus model using fluorescent microspheres with different diameters and evaluated the role of the microspheres' diameters in the generation of a watershed-patterned distribution. We injected fluorescent microspheres of four different diameters (i...
December 1, 2017: Brain Research
https://www.readbyqxmd.com/read/29193158/terlipressin-induced-modifications-of-doppler-ultrasound-signals-of-systemic-arteries-in-preterm-infants-with-vasoactive-resistant-patent-ductus-arteriosus-a-pilot-study
#6
M Radicioni, V Bini, G M Campus, P G Camerini
PURPOSE: To study the effects of terlipressin (TP) infusion on systemic perfusion, estimated with pulsed-wave Doppler ultrasonography of systemic arteries, in a population of extremely low birth-weight (ELBW) preterm infants with vasoactive-resistant ductus arteriosus. METHODS: This prospective, observational cohort included, during five years, 12 ELBW infants with hemodynamically significant patent ductus arteriosus and absent or reversed diastolic flow at Doppler ultrasonography of systemic arteries, despite treatment and high-dose vasoactive support...
November 28, 2017: Journal of Clinical Ultrasound: JCU
https://www.readbyqxmd.com/read/29191547/pial-arteriovenous-fistula-a-brief-review-and-report-of-14-surgically-treated-cases
#7
Atul Goel, Sonal Jain, Abhidha Shah, Survendra Rai, Sandeep Gore, Pralhad Dharurkar
AIM: The authors report their successful experience of treating 14 cases of pial arteriovenous fistula (PAVF) by direct surgery. MATERIAL AND METHODS: During the period January 2010 to April 2017, fourteen patients having PAVF were treated by surgery. Only those cases were selected that had a single arterial feeding channel. There were 9 males and 5 females and their ages ranged from 5 to 53 years (average 19 years). Ten patients were less than 20 years of age. Five patients presented clinical and radiological features that suggested hemorrhage from the PAVF...
November 27, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29190810/aneurysmal-subarachnoid-haemorrhage-asah-five-consecutive-years-experience-of-fars-province-iran
#8
Abdolkarim Rahmanian, Mohammad Jamali, Kamran Bagheri Lankarani, Sulmaz Ghahramani
OBJECTIVE: Subarachnoid haemorrhage (SAH), caused by the rupture of intracranial aneurysms, is a devastating event with high rates of morbidity and mortality. Aneurysmal subarachnoid haemorrhage (aSAH) plays a critical role in the potential loss of life as its sufferers are usually of a young age. We aimed to investigate the incidence of aSAH along with the patients' characteristics over five consecutive years in Fars, a large province located in Southern Iran. METHODS: In this prospective study, anonymous data of all patients diagnosed with aSAH in Fars province were collected after patient admission and surgery...
2017: PloS One
https://www.readbyqxmd.com/read/29187386/high-incidence-of-atrial-fibrillation-after-embolic-stroke-of-undetermined-source-in-posterior-cerebral-artery-territory
#9
Hisaki Makimoto, Muhammed Kurt, Michael Gliem, John-Ih Lee, Jan Schmidt, Patrick Müller, Lukas Clasen, Christoph Brinkmeyer, Dong-In Shin, Sebastian Jander, Malte Kelm, Alexander Fürnkranz
BACKGROUND: Subclinical atrial fibrillation is one possible cause of embolic stroke of undetermined source (ESUS). It remains to be elucidated if a specific infarction site has a predictive value for detecting subclinical atrial fibrillation. We aimed to investigate the predictive value of infarction site in patients with ESUS for the detection of atrial tachyarrhythmia (AT) using an insertable cardiac monitor. METHODS AND RESULTS: Consecutive 146 patients (84 men; aged 62±12 years) underwent insertable cardiac monitor implantation after diagnosis of ESUS...
November 29, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29184342/risk-factors-vascular-lesion-distribution-outcome-and-recurrence-of-strokes-due-to-intracranial-atherosclerosis-one-year-data-from-hyderabad-stroke-registry
#10
Raghu Ram, Subhash Kaul, Suvarna Alladi, Jabeen S Afshan, T Surya Prabha, Abhijeet Kohat, Swetha Tandra, Jyotsna Y Rani
Background: Intracranial atherosclerotic stenosis (ICAS) is a common cause of ischemic stroke in Asian countries and probably in India. Aim: The aim of this study was to describe the risk factors, distribution of vascular lesions, recurrence and outcome of stroke due to ICAS. Methodology: A total of 100 consecutive patients of ischemic stroke due to ICAS were enrolled prospectively from January 1, 2015, to December 31, 2015, and followed for 1 year for treatment compliance and recurrence...
October 2017: Annals of Indian Academy of Neurology
https://www.readbyqxmd.com/read/29183359/acute-on-chronic-bilateral-subdural-hematoma-presenting-with-acute-complete-flaccid-paraplegia-and-urinary-retention-mimicking-an-acute-spinal-cord-injury-a-case-report
#11
H M M T B Herath, Anne Thushara Matthias, Aruna Kulatunga
BACKGROUND: A subdural hematoma refers to a collection of blood between the dura and the arachnoid membranes and is classified into acute, sub acute and chronic. Subdural hematoma has been referred to as the "great neurologic imitator" as it can mimic many neurological conditions. CASE PRESENTATION: Forty-three year old Sri Lankan female presented 2 weeks following traumatic head injury with bilateral flaccid complete paraplegia and urinary retention. Her non-contrast computer tomography of the brain revealed bilateral acute, chronic subdural hematomas...
November 28, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29176266/fibrin-clot-architecture-in-acute-ischemic-stroke-treated-with-mechanical-thrombectomy-with-stent-retrievers%C3%A3-cohort-study
#12
Dagmar Krajíčková, Antonín Krajina, Ivo Šteiner, Oldřich Vyšata, Roman Herzig, Miroslav Lojík, Vendelín Chovanec, Jan Raupach, Ondřej Renc, Jan Waishaupt, Eva Vítková, Petr Dulíček, Pavla Čabelková, Martin Vališ
BACKGROUND: The composition of intra-arterial clots might influence the efficacy of mechanical thrombectomy (MT) in ischemic stroke (IS) due to the acute occlusions within large cerebral arteries. The aims were to assess the factors associated with blood clot structure and the impact of thromboembolus structure on MT using stent-retrievers in patients with acute large artery IS in the anterior circulation.Methods and Results:In an observational cohort study, we studied the components of intra-arterial clots retrieved from large cerebral arteries in 80 patients with acute IS treated with MT with or without i...
November 23, 2017: Circulation Journal: Official Journal of the Japanese Circulation Society
https://www.readbyqxmd.com/read/29174234/in-situ-side-to-side-anastomosis-surgical-technique-and-complication-avoidance
#13
Jiwook Ryu, Yeongu Chung, Sung Ho Lee, Won-Sang Cho, Seok Keun Choi
In situ side-to-side (STS) anastomosis is a unique technique used for intracranial artery-intracranial artery revascularization. During a seven-year period, seven STS anastomoses were performed for anterior cerebral artery aneurysms in six patients and postero-inferior cerebellar artery aneurysm in one patient. We describe a step-by-step guide for suturing techniques from arteriotomy to vessel wall sutures based on clinical experiences, with detailed illustrations. Technical considerations in each stage are also discussed...
November 23, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29172122/brain-substrates-of-early-4h-cigarette-abstinence-identification-of-treatment-targets
#14
Teresa R Franklin, Kanchana Jagannathan, Nathan Hager, Zhuo Fang, Sihua Xu, Joyce Wong, Anna Rose Childress, John A Detre, Hengyi Rao, Reagan Wetherill
INTRODUCTION: Research indicates that overnight nicotine abstinence disrupts neural activity in the mesocorticolimbic reward network; however, less is known about the time course of abstinence-induced brain changes. To examine the potential neural effects of early abstinence, we used arterial spin labeling perfusion fMRI, to measure regional cerebral blood flow (rCBF) changes in the resting brain induced by 4h of nicotine abstinence. METHODS: In a repeated measures design, 5min of resting perfusion fMRI data were acquired in awake nicotine-dependent individuals (eyes open) during 'smoking as usual' (SMK) and following 4h of monitored nicotine abstinence (ABS) conditions (N=20)...
November 20, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/29171118/translesional-pressure-gradient-and-leptomeningeal-collateral-status-in-symptomatic-middle-cerebral-artery-stenosis
#15
Xinyi Leng, Linfang Lan, Hing Lung Ip, Florence Fan, Sze Ho Ma, Karen Ma, Haipeng Liu, Zhengzheng Yan, Jia Liu, Jill Abrigo, Yannie Oy Soo, David S Liebeskind, Ka Sing Wong, Thomas W Leung
BACKGROUND AND PURPOSE: Leptomeningeal collateral (LMC) status governs prognosis of large artery occlusive stroke, while factors determining the LMC status were not fully elucidated. We aimed to investigate metrics affecting LMC status in such patients by using computational fluid dynamics (CFD) models based on CT angiography (CTA). METHODS: In this cross-sectional study, we recruited patients with recent ischemic stroke or transient ischemic attack attributed to atherosclerotic M1 middle cerebral artery (MCA) stenosis (50-99%)...
November 24, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29169168/anterior-borderzone-angle-for-hemodynamic-collateral-metric-in-patients-with-symptomatic-middle-cerebral-artery-stenosis
#16
Yongkun Li, Yunyun Xiong, Qiankun Cai, Dezhi Liu, Qiliang Dai, Wenhua Liu, Zhixin Huang, Wen Sun, David S Liebeskind, Yinzhou Wang, Xinfeng Liu
BACKGROUND AND AIMS: We aimed to introduce a parameter of anterior borderzone angle (ABZA) to quantitatively evaluate the ACA-MCA leptomeningeal collaterals for middle cerebral artery stenosis (MCAS). METHODS: Two hundred seventy-five patients with 50-100% MCAS and 100 controls were included. The 95% reference range of ABZA was obtained from the controls. ABZAtrans was defined as "ABZA/the 95% upper limit." Relationships between ABZA and MCAS, -ABZAtrans and the TICI grade, the American Society of Interventional and Therapeutic Neuroradiology/Society of Interventional Radiology (ASITN/SIR) collateral grade were analyzed...
November 23, 2017: European Neurology
https://www.readbyqxmd.com/read/29166955/brain-arterial-diameters-and-cognitive-performance-the-northern-manhattan-study
#17
Jose Gutierrez, Erin Kulick, Yeseon Park Moon, Chuanhui Dong, Ken Cheung, Bagci Ahmet, Yaakov Stern, Noam Alperin, Tatjana Rundek, Ralph L Sacco, Clinton B Wright, Mitchell S V Elkind
OBJECTIVES: To test the hypothesis that brain arterial diameters are associated with cognitive performance, particularly in arteries supplying domain-specific territories. METHODS: Stroke-free participants in the Northern Manhattan Study were invited to have a brain MRI from 2003-2008. The luminal diameters of 13 intracranial arterial segments were obtained using time-of-flight magnetic resonance angiogram (MRA), and then averaged and normalized into a global score and region-specific arterial diameters...
November 23, 2017: Journal of the International Neuropsychological Society: JINS
https://www.readbyqxmd.com/read/29166846/recurrent-cerebral-infarction-in-anterior-and-posterior-circulation-territories-associated-with-persistent-primitive-hypoglossal-artery-and-carotid-artery-dissection-a-case-report
#18
Jingzhe Han, Ye Ji, Guomei Ma, Zhilei Kang
The persistent primitive hypoglossal artery (PPHA) is the second most common persistent carotid-vertebrobasilar anastomosis. We present a rare case of an 82-year-old woman who diagnosed as acute cerebral infarction three times in both the anterior and posterior circulation territories with a right-sided PPHA and ipsilateral carotid artery dissection (CAD). Microembolus monitoring results suggested that microembolic caused by CAD associated with PPHA should be recognized as a possible cause of multiple infarctions in both the anterior and posterior circulation territories...
November 23, 2017: International Journal of Neuroscience
https://www.readbyqxmd.com/read/29163956/eversion-endarterectomy-under-full-prasugrel-treatment
#19
Thomas Kotsis, Panagitsa Christoforou, Nikolaos Asaloumidis, Erifyli Argyra
The third-generation thienopyridine prasugrel has much stronger antiplatelet effect compared to other current antiplatelet inhibitors and exhibits practically zero resistance in healthy people. Prasugrel is used as a pre- and post-treatment in percutaneous coronary or neurovascular interventions with parallel aspirin regime. However, as there is a higher reported bleeding with intraluminal interventions and meticulous technique is recommended, there is nearly non-existent international experience of open surgery under full prasugrel treatment...
2017: SAGE Open Medical Case Reports
https://www.readbyqxmd.com/read/29163140/simultaneous-imaging-of-cerebrovascular-structure-and-function-in-hypertensive-rats-using-synchrotron-radiation-angiography
#20
Liping Wang, Zhihao Mu, Xiaojie Lin, Jieli Geng, Ti Qiao Xiao, Zhijun Zhang, Yongting Wang, Yongjing Guan, Guo-Yuan Yang
Hypertension has a profound influence on the structure and function of blood vessels. Cerebral vessels undergo both structural and functional changes in hypertensive animals. However, dynamic changes of cerebrovasculature and the factors involved in this process are largely unknown. In this study, we explored the dynamic changes of vascular structure in hypertensive rats using novel synchrotron radiation angiography. Twenty-four spontaneously hypertensive rats (SHR) and 24 Sprague-Dawley (SD) rats underwent synchrotron radiation (SR) angiography...
2017: Frontiers in Aging Neuroscience
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