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Brain arteriovenous malformation

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https://www.readbyqxmd.com/read/28635373/relative-risk-of-hemorrhage-during-pregnancy-in-patients-with-brain-arteriovenous-malformations
#1
Janneke van Beijnum, Tim Wilkinson, Heather J Whitaker, Johanna G van der Bom, Ale Algra, W Peter Vandertop, René van den Berg, Patrick A Brouwer, Gabriël Je Rinkel, L Jaap Kappelle, Rustam Al-Shahi Salman, Catharina Jm Klijn
Background It is unclear whether the risk of bleeding from brain arteriovenous malformations is higher during pregnancy, delivery, or puerperium. We compared occurrence of brain arteriovenous malformation hemorrhage in women during this period with occurrence of hemorrhage outside this period during their fertile years. Methods We included all women with ruptured brain arteriovenous malformations (16-41 years) from a retrospective database of patients with brain arteriovenous malformations in four Dutch university hospitals (n = 95) and from the population-based Scottish Audit of Intracranial Vascular Malformations (n = 44)...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/28625906/the-impact-of-associated-nidal-lesions-in-outcome-of-brain-arteriovenous-malformations-after-radiosurgery-with-or-without-embolization
#2
Carlos Michel A Peres, Evandro Cesar de Souza, Manoel Jacobsen Teixeira, Eberval G Figueiredo, Jose Guilherme M P Caldas
BACKGROUND: Radiosurgery is a valuable option to treat arteriovenous malformations. There are correlations between some morphological nidal features and final results, and the benefits of preradiosurgical embolization have not been well established thus far. METHODS: Analysis of a longitudinal cohort of 47 consecutive patients who underwent radiosurgery with or without previous embolization. Embolizations were performed exclusively with n-butyl cyanoacrylate. Radiosurgery was delivered either as a single or divided in up to 5 equal fractions...
June 15, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28622071/survival-in-out-of-hospital-rapid-sequence-intubation-of-non-traumatic-brain-pathologies
#3
Pieter Francsois Fouche, Paul Andrew Jennings, Karen Smith, Malcolm Boyle, Gabriel Blecher, Jonathan Knott, Mani Raji, Pamela Rosengarten, Michael Roberto Augello, Stephen Bernard
INTRODUCTION: Rapid sequence intubation (RSI) is not only used in traumatic brain injuries in the out-of-hospital setting, but also for non-traumatic brain pathologies (NTBP) such as brain tumors, meningitis, encephalitis, hypoxic/anoxic brain injury, stroke, arteriovenous malformations, tumors, aneurysms, brain hemorrhage, as well as brain injury due to diabetes, seizures and toxicity, metabolic conditions, and alcohol and drug overdose. Previous research suggests that RSI is common in non-traumatic coma, but with an unknown prevalence of NTBP in those that receive RSI...
June 16, 2017: Prehospital Emergency Care
https://www.readbyqxmd.com/read/28608633/asymptomatic-pulmonary-arteriovenous-malformations-in-children-with-hereditary-hemorrhagic-telangiectasia
#4
Ashley M Gefen, Andrew J White
BACKGROUND: Children with Hereditary Hemorrhagic Telangiectasia (HHT) may have pulmonary arteriovenous malformations (AVMs), which can lead to symptoms of shortness of breath, exercise intolerance, clubbing, cyanosis and hemoptysis. However, some patients with pulmonary AVMs may be asymptomatic, placing them at risk for complications such as stroke or brain abscess if they are not identified and treated. This study examines the incidence of signs and symptoms associated with pulmonary AVMs in children with HHT known to have pulmonary AVMs...
June 13, 2017: Pediatric Pulmonology
https://www.readbyqxmd.com/read/28608353/-causes-of-hospital-mortality-due-to-brain-haemorrhage-in-patients-with-arteriovenous-malformation
#5
J Vilalta, F Arikan, R Torne, R Najarro, D Lopez, A Rodriguez-Hernandez, D Gandara, P Banos
AIM: To determine the causes of mortality in cases of brain haemorrhage among patients with arteriovenous malformations (AVM) treated in a tertiary hospital. PATIENTS AND METHODS: The patients with AVM who died over the period 1990-2014 were selected from a prospective register of vascular malformations. Demographic aspects, localisation of the AVM, associated aneurysms and previous treatments were reviewed. Three main causes of death were established: initial bleeding/rebleeding, those related with the treatment of the AVM and other causes not related with AVM...
June 16, 2017: Revista de Neurologia
https://www.readbyqxmd.com/read/28603431/hereditary-hemorrhagic-telangiectasia-and-pregnancy-potential-adverse-events-and-pregnancy-outcomes
#6
REVIEW
Omar Bari, Philip R Cohen
Hereditary hemorrhagic telangiectasia (HHT) is an autosomal dominant condition with a prevalence of ~1 in 5,000 individuals. The pathophysiology of this condition centers on the lack of capillary beds between arterioles and venules, leading to direct contact between these vessels. This results in telangiectases on characteristic locations such as the face, fingers, mouth, and nasal mucosa. Visceral arteriovenous malformations (AVMs) are also observed in many patients, and these are most commonly seen in the brain, gastrointestinal tract, and lungs...
2017: International Journal of Women's Health
https://www.readbyqxmd.com/read/28602661/brain-arteriovenous-malformations-located-in-language-area-surgical-outcomes-and-risk-factors-for-postoperative-language-deficits
#7
Yuming Jiao, Fuxin Lin, Jun Wu, Hao Li, Xin Chen, Zhicen Li, Ji Ma, Yong Cao, Shuo Wang, Jizong Zhao
OBJECT: Case selection for surgical treatment of language area brain arteriovenous malformations (L-BAVMs) remains difficult. This study aimed to determine the surgical outcomes and risk factors for postoperative language deficits (LD) in patients with L-BAVMs. METHODS: Patients with L-BAVMs who underwent microsurgical resection between September 2012 and June 2016 were reviewed. All patients had undergone preoperative functional magnetic resonance imaging (fMRI) and diffusion tensor imaging (DTI)...
June 7, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28600483/extending-the-indications-for-transvenous-approach-embolization-for-superficial-brain-arteriovenous-malformations
#8
Dinark Conceição Viana, Luis Henrique de Castro-Afonso, Guilherme Seizem Nakiri, Lucas Moretti Monsignore, Felipe Padovani Trivelato, Oscar Benedicto Colli, Daniel Giansante Abud
INTRODUCTION: Transarterial embolization is the standard endovascular treatment strategy for intracranial arteriovenous malformations (AVMs). The transvenous approach has been indicated for the embolization of deep AVMs meeting a set of strict eligibility criteria. The present study aims to assess the safety and efficacy of the transvenous approach for superficial AVMs. METHODS: A retrospective series of 12 patients presenting with cortical AVMs were treated by endovascular embolization using a transvenous approach with a curative intent...
June 9, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28583455/brain-arteriovenous-malformations-located-in-premotor-cortex-surgical-outcomes-and-risk-factors-for-postoperative-neurological-deficits
#9
Yuming Jiao, Fuxin Lin, Jun Wu, Hao Li, Xin Chen, Zhicen Li, Ji Ma, Yong Cao, Shuo Wang, Jizong Zhao
OBJECT: The premotor cortex (PMC) is known to have a dual role in both movement and language processing. Nevertheless, surgical outcomes of premotor cortex BAVMs (PMC-BAVMs) have not been well-defined. The aim of this study was to determine the surgical outcomes and risk factors for neurological deficits (ND) after surgery in patients with PMC-BAVMs. METHODS: We retrospectively reviewed patients with PMC-BAVMs who underwent surgical resection of the nidus. All patients had undergone preoperative functional MRI (fMRI), diffusion tensor imaging (DTI), MRI, 3D time-of-flight MRA (3D TOF-MRA) and digital subtraction angiography (DSA)...
June 2, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28559076/prenatal-diagnosis-and-multimodal-neonatal-treatment-of-a-rare-pial-arteriovenous-fistula-case-report-and-review-of-the-literature
#10
Alessandro Pedicelli, Marta Iacobucci, Paolo Frassanito, Emilio Lozupone, Concezio Di Rocco, Cesare Colosimo
Intracranial pial arteriovenous fistulas (PAVFs) are direct communications between the arterial and venous system of the brain, with the characteristic absence of a plexiform nidus, as seen in the classic cerebral arteriovenous malformations. These vascular malformations, usually occurring in the pediatric population, are very rarely diagnosed in uterus, due to a lack of understanding of the condition and because they may be hard to visualize. We report a rare case of a mass effect PAVF diagnosed with fetal MRI, involving the right cerebral hemisphere, fed by a pericallosal artery and associated with a giant venous dilatation...
May 27, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28556691/t1-weighted-dynamic-contrast-enhanced-brain-magnetic-resonance-imaging-a-preliminary-study-with-low-infusion-rate-in-pediatric-patients
#11
Bruno-Bernard Rochetams, Bénédicte Marechal, Jean-Philippe Cottier, Kathleen Gaillot, Catherine Sembely-Taveau, Dominique Sirinelli, Baptiste Morel
Background The aim of this preliminary study is to evaluate the results of T1-weighted dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) in pediatric patients at 1.5T, with a low peripheral intravenous gadoteric acid injection rate of 1 ml/s. Materials and methods Children with neurological symptoms were examined prospectively with conventional MRI and T1-weighted DCE MRI. An magnetic resonance perfusion analysis method was used to obtain time-concentration curves (persistent pattern, type-I; plateau pattern, type-II; washout pattern, type-III) and to calculate pharmacokinetic parameters...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28555270/critical-review-of-brain-avm-surgery-surgical-results-and-natural-history-in-2017
#12
REVIEW
Michael Kerin Morgan, Andrew Stewart Davidson, Nazih N A Assaad, Marcus Andrew Stoodley
BACKGROUND: An understanding of the present standing of surgery, surgical results and the role in altering the future morbidity and mortality of untreated brain arteriovenous malformations (bAVMs) is appropriate considering the myriad alternative management pathways (including radiosurgery, embolization or some combination of treatments), varying risks and selection biases that have contributed to confusion regarding management. The purpose of this review is to clarify the link between the incidence of adverse outcomes that are reported from a management pathway of either surgery or no intervention with the projected risks of surgery or no intervention...
May 29, 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28552161/multimodality-management-of-cerebral-arteriovenous-malformations
#13
Mohan Narayanan, Gursant S Atwal, Peter Nakaji
Arteriovenous malformations (AVMs) of the brain are diverse lesions that vary widely in location, size, and complexity. Treatment options for AVMs are correspondingly complex. Complete elimination of an AVM is required to protect patients from future hemorrhage. Decisions about whether to treat and, if so, how to treat these lesions depend on the characteristics of the patient and the specific characteristics of the AVMs. The characteristics of AVMs are often summarized through grading systems. Some AVMs can be managed conservatively, whereas others can be managed with microsurgical resection, radiosurgical ablation, or endovascular embolization, either individually or in combination...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28552160/radiosurgery-for-the-management-of-cerebral-arteriovenous-malformations
#14
Dale Ding, Robert M Starke, Jason P Sheehan
Cerebral arteriovenous malformations (AVMs) are rare, unstable vascular lesions which spontaneously rupture at a rate of approximately 2-4% annually. Stereotactic radiosurgery is a minimally invasive treatment for AVMs, with a favorable risk-to-benefit profile in most patients, with respect to obliteration, hemorrhage, and seizure control. Radiosurgery is ideally suited for small to medium-sized AVMs (diameter <3cm or volume <12cm(3)) located in deep or eloquent brain regions. Obliteration is ultimately achieved in 70-80% of cases and is directly associated with nidus volume and radiosurgical margin dose...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28552158/epidemiology-genetics-pathophysiology-and-prognostic-classifications-of-cerebral-arteriovenous-malformations
#15
Alp Ozpinar, Gustavo Mendez, Adib A Abla
Arteriovenous malformations (AVMs) are vascular deformities involving fistula formation of arterial to venous structures without an intervening capillary bed. Such anomalies can prove fatal as the high arterial flow can disrupt the integrity of venous walls, thus leading to dangerous sequelae such as hemorrhage. Diagnosis of these lesions in the central nervous system can often prove challenging as intracranial AVMs represent a heterogeneous vascular pathology with various presentations and symptomatology. The literature suggests that most brain AVMs (bAVMs) are identified following evaluation of the etiology of acute cerebral hemorrhage, or incidentally on imaging associated with seizure or headache workup...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28552157/surgical-management
#16
Michael K Morgan
Surgical management includes selection of patients for surgery, performing the technical procedure of brain arteriovenous malformation (bAVM) resection and perioperative management that maximize the chance for the best outcome. In general the Spetzler-Ponce class (SPC) can divide patients into those with good evidence that surgery is appropriate in most cases (SPC A), those in whom surgery should only be considered occasionally with highly nuanced indications (SPC C), and surgery may be appropriate having made a detailed analysis of patient (including age), clinical (including mode of presentation), and AVM characteristics (including diffuseness), and a comparative analysis of outcomes with alternate management pathways for SPC B cases...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28552148/arteriovenous-malformations-epidemiology-clinical-presentation-and-diagnostic-evaluation
#17
Joshua W Osbun, Matthew R Reynolds, Daniel L Barrow
Brain arteriovenous malformations (AVMs) represent an uncommon disease of the central nervous system characterized by an arteriovenous shunt in which one or multiple arterial pedicles feed into a vascular nidus, creating early drainage into a venous outflow channel. These lesions are considered to be congenital and can come to clinical attention in a variety of ways such as seizure, intracranial hemorrhage, chronic headache or progressive neurological deficit. We focus on the epidemiology, clinical presentation and diagnostic evaluation in this chapter...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28549393/meningioma-embolization-with-the-pressure-cooker-technique-using-squid-12
#18
Zoltán Szatmáry, Jan Hillman, Stephanos Finitsis
Background Preoperative meningioma embolization may be performed with microparticles or liquid embolic agents. The pressure cooker technique (PCT) has recently been described for the embolization of brain arteriovenous malformations (AVMs). Case We present the case of a 73-year-old woman with a large frontal interhemispheric meningioma that was successfully preoperatively embolized with the PCT using Squid 12, a new ethyl-vinyl alcohol copolymer embolic agent. The PCT presents considerable advantages relative to conventional embolization techniques such as deeper and faster tumor penetration and embolization of tumors with difficult vascular access, and retrograde feeling of pial afferents may be achieved...
January 1, 2017: Interventional Neuroradiology
https://www.readbyqxmd.com/read/28548596/cyst-formation-after-stereotactic-radiosurgery-for-brain-arteriovenous-malformations-a-systematic-review
#19
Adeel Ilyas, Ching-Jen Chen, Dale Ding, Panagiotis Mastorakos, Davis G Taylor, I Jonathan Pomeraniec, Cheng-Chia Lee, Jason Sheehan
OBJECTIVE Cyst formation can occasionally occur after stereotactic radiosurgery (SRS) for brain arteriovenous malformations (AVMs). Given the limited data regarding post-SRS cyst formation in patients with AVM, the time course, natural history, and management of this delayed complication are poorly defined. The aim of this systematic review was to determine the incidence, time course, and optimal management of cyst formation after SRS for AVMs. METHODS A literature review was performed using PubMed to identify studies reporting cyst formation in AVM patients treated with SRS...
May 26, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28522939/identification-of-protein-targets-in-cerebral-endothelial-cells-for-brain-arteriovenous-malformation-avms-molecular-therapies
#20
Margaret Simonian, Rachel R Ogorzalek Loo, Nalaka Rannulu, Joseph A Loo, Mark P Molloy, Marcus A Stoodley
BACKGROUND: To develop a new molecular targeted treatment for brain (AVMs), identification of membrane proteins that are localised on the AVM endothelium is crucial. Current treatment methods are surgery and radiosurgery. However, complete occlusion post radiosurgery are achieved within 3 years, while patient remain at risk of haemorrhage. This study aims to identify potential protein targets in AVM endothelial cells that discriminate these vessels from normal vessels; these proteins targets will be investigated for the molecular therapy of brain AVMs to promote rapid thrombosis after radiosurgery...
2017: Clinical Proteomics
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