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https://www.readbyqxmd.com/read/28228390/traumatic-aneurysm-of-the-cortical-middle-cerebral-artery
#1
Shivesh Varma, Lisa Banh, Paul Smith
No abstract text is available yet for this article.
February 21, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28227130/verification-of-a-research-prototype-for-hemodynamic-analysis-of-cerebral-aneurysms
#2
Takashi Suzuki, Cosmin Ioan Nita, Saikiran Rapaka, Hiroyuki Takao, Viorel Mihalef, Soichiro Fujimura, Chihebeddine Dahmani, Puneet Sharma, Hiroya Mamori, Toshihiro Ishibashi, Thomas Redel, Makoto Yamamoto, Yuichi Murayama, Takashi Suzuki, Cosmin Ioan Nita, Saikiran Rapaka, Hiroyuki Takao, Viorel Mihalef, Soichiro Fujimura, Chihebeddine Dahmani, Puneet Sharma, Hiroya Mamori, Toshihiro Ishibashi, Thomas Redel, Makoto Yamamoto, Yuichi Murayama, Cosmin Ioan Nita, Puneet Sharma, Hiroya Mamori, Soichiro Fujimura, Thomas Redel, Saikiran Rapaka, Chihebeddine Dahmani, Toshihiro Ishibashi, Makoto Yamamoto, Viorel Mihalef, Takashi Suzuki, Hiroyuki Takao, Yuichi Murayama
Owing to its clinical importance, there has been a growing body of research on understanding the hemodynamics of cerebral aneurysms. Traditionally, this work has been performed using general-purpose, state-of-the-art commercial solvers. This has meant requiring engineering expertise for making appropriate choices on the geometric discretization, time-step selection, choice of boundary conditions etc. Recently, a CFD research prototype has been developed (Siemens Healthcare GmbH, Prototype - not for diagnostic use) for end-to-end analysis of aneurysm hemodynamics...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227068/the-impact-of-deformation-of-an-aneurysm-model-under-pulsatile-flow-on-hemodynamic-analysis
#3
T Kawakami, H Takao, C Ichikawa, K Kamiya, Y Murayama, M Motosuke, T Kawakami, H Takao, C Ichikawa, K Kamiya, Y Murayama, M Motosuke, C Ichikawa, H Takao, K Kamiya, M Motosuke, T Kawakami, Y Murayama
Hemodynamic analysis of cerebral aneurysms has been widely carried out to clarify the mechanisms of their growth and rupture. In several cases, patient-specific aneurysm models made of transparent polymers have been used. Even though periodic changes in aneurysms due to the pulsation of blood flow could be important, the deformation of the model geometry and its effect on hemodynamic evaluation has not been fully investigated. In addition, the fabrication accuracy of aneurysm models has not been evaluated even though it may affect the hemodynamic parameters to be analyzed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28217397/a5-segment-aneurysm-of-the-anterior-cerebral-artery-imbedded-into-the-body-of-the-corpus-callosum-a-case-report
#4
Fransua Sharafeddin, Ahmad Hafez, Martin Lehecka, Rahul Raj, Roberto Colasanti, Ahmadreza Rafiei, Joham Choque, Behnam R Jahromi, Mika Niemelä, Juha Hernesniemi
BACKGROUND: The A5 segment aneurysms of the anterior cerebral artery are rare, approximately 0.5% of all intracranial aneurysms. They are small with a wide base located in the midline, with the domes mostly projecting upward or backward. CASE DESCRIPTION: The authors describe a unique case of A5 segment aneurysm, with the dome embedded into the body of the corpus callosum. This 41-year-old female was admitted to the neurology department for possible multiple sclerosis investigation...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28217390/management-of-aneurysmal-subarachnoid-hemorrhage-state-of-the-art-and-future-perspectives
#5
REVIEW
Giovanni Grasso, Concetta Alafaci, R Loch Macdonald
BACKGROUND: Aneurysmal subarachnoid hemorrhage (SAH) accounts for 5% of strokes and carries a poor prognosis. It affects around 6 cases per 100,000 patient years occurring at a relatively young age. METHODS: Common risk factors are the same as for stroke, and only in a minority of the cases, genetic factors can be found. The overall mortality ranges from 32% to 67%, with 10-20% of patients with long-term dependence due to brain damage. An explosive headache is the most common reported symptom, although a wide spectrum of clinical disturbances can be the presenting symptoms...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/28216398/engaging-in-a-keyhole-concept-for-the-management-of-ruptured-and-unruptured-aneurysms
#6
Daniel D Cavalcanti, Roberto C de Paula, Paula L Alvarenga, Paulo José P da Mata, Paulo Niemeyer Filho
OBJECTIVE: Many new endovascular devices have been used under the guidance of the International Subarachnoid Aneurysm Trial (ISAT). Clipping still offers higher occlusion rates, and its technique continues to evolve, resulting in smaller exposures and reduced manipulation to brain tissue. We sought to evaluate the routine use of the minisphenoidal approach to manage intracranial aneurysms in a high-volume institution. METHODS: We retrospectively reviewed our database of aneurysm patients from October 2013 to May 2016...
February 16, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28216212/-sentinel-seizure-as-a-warning-sign-preceding-fatal-rupture-of-a-giant-middle-cerebral-artery-aneurysm
#7
Lukas Andereggen, Robert H Andres
BACKGROUND: Sentinel headache is a well-known warning sign preceding subarachnoid hemorrhage (SAH) due to rupture of an intracranial aneurysm. New-onset seizure or "sentinel seizure" preceding aneurysmal SAH, however, is uncommon. CASE DESCRIPTION: We report on a 51-year-old man who presented with a new-onset seizure. Diagnostic work-up revealed a giant middle cerebral artery aneurysm without evidence of subarachnoid or intracerebral hemorrhage. Anti-epileptic therapy was initiated, elective diagnostic angiography and subsequent treatment was scheduled and the patient discharged home...
February 12, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28215029/an-introduction-to-the-pathophysiology-of-aneurysmal-subarachnoid-hemorrhage
#8
REVIEW
Jasper H van Lieshout, Maxine Dibué-Adjei, Jan F Cornelius, Philipp J Slotty, Toni Schneider, Tanja Restin, Hieronymus D Boogaarts, Hans-Jakob Steiger, Athanasios K Petridis, Marcel A Kamp
Pathophysiological processes following subarachnoid hemorrhage (SAH) present survivors of the initial bleeding with a high risk of morbidity and mortality during the course of the disease. As angiographic vasospasm is strongly associated with delayed cerebral ischemia (DCI) and clinical outcome, clinical trials in the last few decades focused on prevention of these angiographic spasms. Despite all efforts, no new pharmacological agents have shown to improve patient outcome. As such, it has become clear that our understanding of the pathophysiology of SAH is incomplete and we need to reevaluate our concepts on the complex pathophysiological process following SAH...
February 18, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28213195/blunt-traumatic-brain-injury-patients-a-role-for-ct-angiography-of-the-head-to-evaluate-non-traumatic-etiologies
#9
REVIEW
Ha Nguyen, Ninh Doan, Michael Gelsomino, Saman Shabani
BACKGROUND: In the setting of trauma, the etiology of intracranial hemorrhage (ICH) is frequently attributed to the physical, traumatic event. Caution should still be directed towards non-traumatic (or spontaneous) etiologies responsible for the trauma, such as hypertension, cerebral amyloid angiopathy, aneurysms, vascular malformation, and hemorrhagic infarcts. The role for immediate CT angiography (CTA) remains controversial to evaluate for non-traumatic etiologies. METHODS: A systematic review of the available literature in Medline PubMed database...
February 14, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28210239/flow-diversion-for-the-treatment-of-mca-bifurcation-aneurysms-a-single-centre-experience
#10
Pervinder Bhogal, Muhammad AlMatter, Hansjörg Bäzner, Oliver Ganslandt, Hans Henkes, Marta Aguilar Pérez
BACKGROUND: Intracranial aneurysms located at the bifurcation of the middle cerebral artery (MCA) can often be challenging for the neurointerventionalist. We aimed to evaluate the efficacy and safety of flow diverting stents (FDS) in the treatment of these aneurysms. MATERIALS AND METHODS: We retrospectively reviewed our prospectively maintained database to collect information for all patients with unruptured saccular bifurcation MCA aneurysms treated with FDS between January 2010 and January 2016...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28209770/are-patients-with-loeys-dietz-syndrome-misdiagnosed-with-beals-syndrome
#11
Rebecca Woolnough, Andrew Dhawan, Kimberly Dow, Jagdeep S Walia
Beals syndrome, also known as congenital contractural arachnodactyly (Online Mendelian Inheritance in Man: 121050), is an autosomal dominant disorder caused by a mutation in FBN2 that is typically characterized by congenital contractures and arachnodactyly. It shares a number of phenotypic features with Loeys-Dietz syndrome (Online Mendelian Inheritance in Man: 609192). Loeys-Dietz syndrome, initially described in 2005, is associated with mutations for the transforming growth factor β receptor and is characterized by findings of cerebral, thoracic, and abdominal arterial aneurysms...
February 16, 2017: Pediatrics
https://www.readbyqxmd.com/read/28209576/differences-in-hemodynamics-and-rupture-rate-of-aneurysms-at-the-bifurcation-of-the-basilar-and-internal-carotid-arteries
#12
R Doddasomayajula, B Chung, F Hamzei-Sichani, C M Putman, J R Cebral
BACKGROUND AND PURPOSE: Cerebral aneurysms in the posterior circulation are known to have a higher rupture risk than those in the anterior circulation. We sought to test the hypothesis that differences in hemodynamics can explain the difference in rupture rates. MATERIALS AND METHODS: A total of 117 aneurysms, 63 at the tip of the basilar artery (27 ruptured, 36 unruptured, rupture rate = 43%) and 54 at the bifurcation of the internal carotid artery (11 ruptured, 43 unruptured, rupture rate = 20%) were analyzed with image-based computational fluid dynamics...
February 16, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28209313/the-arborization-bypass-sequential-intracranial-intracranial-bypasses-for-an-unruptured-fusiform-mca-aneurysm
#13
Jonathan J Russin
Revascularization techniques are being featured more prominently as endovascular treatments continue to select out complex cerebrovascular pathologies for open surgical management. The current healthcare environment requires decreased hospital stays and improved clinical outcomes despite the growing complexity of open surgical cases. Recent efforts to reduce operative room time and decrease risk for bypass surgery have focused on avoiding graft harvest and maintaining the entire bypass intracranial. The presented technique features an arborization bypass to serially anastomose the middle cerebral artery vessels allowing for proximal trapping of a complex aneurysm without graft harvest...
February 10, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28209306/successful-coil-embolization-of-a-ruptured-mycotic-aneurysm-that-developed-three-days-after-septic-embolic-infarction-case-report-and-review-of-the-literature
#14
Joshua L Wang, Archana P Hinduja, Ciarán J Powers
BACKGROUND: Infectious intracranial aneurysms (IIAs) are rare entities and are often associated with septic embolus from infectious endocarditis. They may develop rapidly and carry a higher risk of rupture and mortality compared to noninfectious aneurysms. However, the development and rupture of an IIA within 48h in a patient with septic infarction patient is exceedingly rare. CASE DESCRIPTION: In this report, we describe a 25-year-old male who presented with left-sided hemiparesis and dysarthria from septic embolus to the right middle cerebral artery...
February 10, 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28207465/two-rare-variants-of-left-vertebral-artery
#15
Rajani Singh
Though the variations of vertebral artery are clinically asymptomatic yet abnormalities are of diagnostic importance either prior to vascular surgery in the neck region or in patients of intravascular diseases such as arteriovenous malformations or cerebral aneurysms. Therefore, the aim of the study is to bring out 2 variations in the configuration of vertebral artery and their clinical implication. During dissection of thorax of 2 female cadavers, 2 different variants of configurations of left vertebral arteries were observed...
February 15, 2017: Journal of Craniofacial Surgery
https://www.readbyqxmd.com/read/28201763/the-barrow-neurological-institute-scale-revisited-predictive-capabilities-for-cerebral-infarction-and-clinical-outcome-in-patients-with-aneurysmal-subarachnoid-hemorrhage
#16
Nora F Dengler, Dominik Diesing, Asita Sarrafzadeh, Stefan Wolf, Peter Vajkoczy
No abstract text is available yet for this article.
February 14, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28196918/m1-macrophages-are-required-for-murine-cerebral-aneurysm-formation
#17
Kamil W Nowicki, Koji Hosaka, Frank J Walch, Edward W Scott, Brian L Hoh
INTRODUCTION: Macrophages and neutrophils have been separately implicated in cerebral aneurysm formation. The interactions between different myeloid subsets and the contributions of macrophage phenotypes in these lesions over time are not known. The purpose of the study was to examine macrophage phenotypic changes in cerebral aneurysms. METHODS: We induced aneurysm formation in C57BL/6 mice and quantified contributions of M1 and M2 macrophages in aneurysm specimens with or without neutrophil blockade...
February 14, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28195428/blood-brain-barrier-breakdown-in-reversible-cerebral-vasoconstriction-syndrome-implications-for-pathophysiology-and-diagnosis
#18
Mi Ji Lee, Jihoon Cha, Hyun Ah Choi, Sook-Young Woo, Seonwoo Kim, Shuu-Jiun Wang, Chin-Sang Chung
OBJECTIVE: Diagnosis of reversible cerebral vasoconstriction syndrome (RCVS) is currently based on luminographic findings of vasoconstriction. In addition to vasoconstriction, the blood-brain barrier (BBB) breakdown has been postulated as a central mechanism of RCVS. Our aim was to document BBB breakdown in patients with RCVS and its role for the pathophysiology-based diagnosis of RCVS. METHODS: We prospectively recruited 72 consecutive patients with thunderclap headache who did not have aneurysmal subarachnoid hemorrhage from April 2015 to July 2016 at the Samsung Medical Center...
February 13, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28194506/treatment-of-type-ii-endoleaks-with-a-novel-agent-precipitating-hydrophobic-injectable-liquid-phil
#19
Amir Helmy, Nadeem Shaida
OBJECTIVE: Endovascular aortic aneurysm repair has become the principle technique used to treat abdominal aortic aneurysms. However, its long-term success is limited by complications, including type II endoleaks from lumbar arteries and the inferior mesenteric artery. Treatment of these endoleaks can be difficult. The most commonly performed procedure is embolisation via mesenteric or iliolumbar vessels. Embolic agents currently used include coils, glue and Onyx, all of which have their limitations...
February 13, 2017: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/28194399/the-role-of-permissive-and-induced-hypotension-in-current-neuroanesthesia-practice
#20
Suren Soghomonyan, Nicoleta Stoicea, Gurneet S Sandhu, Jeffrey J Pasternak, Sergio D Bergese
BACKGROUND: Induced hypotension (IH) had been used for decades in neurosurgery to reduce the risk for intraoperative blood loss and decrease blood replacement. More recently, this method fell out of favor because of concerns for cerebral and other end-organ ischemia and worse treatment outcomes. Other contributing factors to the decline in its popularity include improvements in microsurgical technique, widespread use of endovascular procedures, and advances in blood conservation and transfusion protocols...
2017: Frontiers in Surgery
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