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Arteriovenous malformation

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https://www.readbyqxmd.com/read/29353256/dieulafoy-s-disease-with-mediastinal-arteriovenous-malformation
#1
Andrea Zhi Xin Foo, Anne Ann Ling Hsu
No abstract text is available yet for this article.
January 20, 2018: Thorax
https://www.readbyqxmd.com/read/29352651/catheter-injected-bone-marrow-mesenchymal-stem-cells-induce-efficacious-occlusion-of-arteriovenous-nidus-in-a-swine-model
#2
Joseph Touma, Jianping Dai, Andre Gaston, Marianne Gervais, Eric Allaire
OBJECTIVES: Arteriovenous malformations (AVMs) are complex vascular lesions. Surgical excision is the treatment of choice, but is often not achievable. Embolo-sclerotherapy alone is associated with high recurrence rates. This study tested the hypothesis that seeding hydrogel conditioned bone marrow derived mesenchymatous stem cells (BM-MSCs) in an AVM nidus model induces solid microvascular occlusion through endoluminal tissue growth. METHODS: AVMs were modelled as arteriovenous microvascular nidus, using swine rete mirabile, a plexiform intracranial structure composed of arterial microvessels that extensively anastomose...
January 15, 2018: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29352055/concomitant-conus-medullaris-arteriovenous-shunts-and-sacral-dural-arteriovenous-fistulas-pathophysiological-links-related-to-the-venous-drainage-of-the-lesions-in-a-series-of-five-cases
#3
Andrea Rosi, Arturo Consoli, Stéphanie Condette-Auliac, Oguzhan Coskun, Federico Di Maria, Georges Rodesch
BACKGROUND: Spinal cord arteriovenous shunts (scAVSs) are a group of lesions located in the spinal cord itself or in the surrounding structures. The most common scAVSs are spinal dural arteriovenous fistulas (sDAVFs), which are acquired lesions. The pathogenesis of sDAVFs involves thrombosis and venous hypertension as trigger factors. Intradural scAVSs such as spinal cord arteriovenous nidus type malformations (AVMs) and pial arteriovenous fistulas are less common than sDAVFs and are considered to have a so-called 'congenital' origin...
January 19, 2018: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/29351691/out-of-field-doses-in-children-treated-for-large-arteriovenous-malformations-using-hypofractionated-gamma-knife-radiosurgery-and-intensity-modulated-radiation-therapy
#4
Marijke De Saint-Hubert, Marija Majer, Hrvoje Hršak, Zdravko Heinrich, Željka Kneževic, Saveta Miljanic, Paulina Porwol, Liliana Stolarczyk, Filip Vanhavere, Roger M Harrison
The purpose of this study was to measure out-of-field organ doses in two anthropomorphic child phantoms for the treatment of large brain arteriovenous malformations (AVMs) using hypofractionated gamma knife (GK) radiosurgery and to compare these with an alternative treatment using intensity-modulated radiation therapy (IMRT). Target volume was identical in size and shape in all cases. Radiophotoluminescent (RPL), thermoluminescent (TL) and optically stimulated luminescent (OSL) dosimeters were used for out-of-field dosimetry during GK treatment and a good agreement within 1-2% between results was shown...
January 17, 2018: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29351598/smooth-muscle-cells-of-intracranial-vessels-from-development-to-disease
#5
Juhana Frösen, Anne Joutel
Cerebrovascular diseases that cause ischemic or hemorrhagic stroke with subsequent loss of life or functional capacity due to damage of the brain tissue are among the leading causes of human suffering and economic burden inflicted by diseases in the developed world. Diseases affecting intracranial vessels are significant contributors to ischemic and hemorrhagic strokes. Brain arteriovenous malformations (bAVM), which are a collection of abnormal blood vessels connecting arteries to veins, are the most common cause of intracranial hemorrhage in children and young adults...
January 16, 2018: Cardiovascular Research
https://www.readbyqxmd.com/read/29350590/human-genetics-and-molecular-mechanisms-of-vein-of-galen-malformation
#6
Daniel Duran, Philipp Karschnia, Jonathan R Gaillard, Jason K Karimy, Mark W Youngblood, Michael L DiLuna, Charles C Matouk, Beverly Aagaard-Kienitz, Edward R Smith, Darren B Orbach, Georges Rodesch, Alejandro Berenstein, Murat Gunel, Kristopher T Kahle
Vein of Galen malformations (VOGMs) are rare developmental cerebrovascular lesions characterized by fistulas between the choroidal circulation and the median prosencephalic vein. Although the treatment of VOGMs has greatly benefited from advances in endovascular therapy, including technical innovation in interventional neuroradiology, many patients are recalcitrant to procedural intervention or lack accessibility to specialized care centers, highlighting the need for improved screening, diagnostics, and therapeutics...
January 19, 2018: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/29346607/combined-endovascular-and-microsurgical-treatment-of-a-premotor-arteriovenous-malformation-2-dimensional-operative-video
#7
M Yashar S Kalani, Robert F Spetzler
No abstract text is available yet for this article.
January 13, 2018: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/29344712/usefulness-of-hydrogel-coated-coils-in-embolization-of-pulmonary-arteriovenous-malformations
#8
Masashi Shimohira, Tatsuya Kawai, Takuya Hashizume, Masahiro Muto, Masanori Kitase, Yuta Shibamoto
PURPOSE: To evaluate the usefulness of hydrogel-coated coils for preventing recanalization after coil embolization of pulmonary arteriovenous malformations (PAVMs). MATERIALS AND METHODS: Thirty-seven consecutive patients with 57 untreated PAVMs underwent coil embolization with hydrogel-coated coils between January 2013 and Jun 2017. The mean age was 49 years (range 9-83 years), and there were seven male patients and 30 female patients. The median size of the feeding artery was 3...
January 17, 2018: Cardiovascular and Interventional Radiology
https://www.readbyqxmd.com/read/29343148/predictors-of-intracranial-hemorrhage-volume-and-distribution-in-brain-arteriovenous-malformation
#9
Jay F Yu, Andrew D Nicholson, Jeffrey Nelson, Matthew D Alexander, Stephanie H Tse, Steven W Hetts, J Claude Hemphill, Helen Kim, Daniel L Cooke
Background and purpose Despite evidence regarding risk factors for brain arteriovenous malformation (bAVM)-associated spontaneous intracranial hemorrhage (ICH), few data exist describing the spectrum of clinical outcomes that bAVM-associated ICH may manifest. This study aimed to identify the demographical, clinical, and bAVM anatomical variables associated with ICH volume and the presence of intraventricular hemorrhage (IVH) of ruptured bAVMs, two indicators of worse clinical outcome, to help better predict outcome for unruptured bAVMs...
January 1, 2018: Interventional Neuroradiology
https://www.readbyqxmd.com/read/29342048/external-ear-arteriovenous-malformation
#10
Nadia Saddoud, Salma Kchaou, Asma Louati, Mohamed Habib Daghfous
No abstract text is available yet for this article.
January 16, 2018: Otology & Neurotology
https://www.readbyqxmd.com/read/29334259/development-of-three-dimensional-brain-arteriovenous-malformation-model-for-patient-communication-and-young-neurosurgeon-education
#11
Mengqi Dong, Guangzhong Chen, Kun Qin, Xiaowen Ding, Dong Zhou, Chao Peng, Shaojian Zeng, Xianming Deng
PURPOSE: Rapid prototyping technology is used to fabricate three-dimensional (3D) brain arteriovenous malformation (AVM) models and facilitate presurgical patient communication and medical education for young surgeons. METHODS: Two intracranial AVM cases were selected for this study. Using 3D CT angiography or 3D rotational angiography images, the brain AVM models were reconstructed on personal computer and the rapid prototyping process was completed using a 3D printer...
January 15, 2018: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/29330274/cerebrofacial-arteriovenous-metameric-syndrome-with-hypopituitarism-a-rare-association
#12
Justin Christopher Ng, Chinthaka Appuhamy, Wickly Lee
Case of cerebrofacial arteriovenous metameric syndrome (CAMS) in a 9-year-old boy is described with arteriovenous malformation simultaneously involving the brain and face, with characteristic CAMS type 1 and 2 involvement. This patient demonstrates the wide spectrum of clinical manifestations of CAMS, and in this particular case, the patient exhibits features of hypopituitarism-an association that was not previously described in the literature to our knowledge. Awareness of the underlying embryological abnormality and recognition of resultant clinical and radiological presentations are paramount for diagnosis and treatment...
January 12, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29328001/gamma-knife-radiosurgery-of-saccular-aneurysms-in-a-rabbit-model
#13
Mark D Meadowcroft, Timothy K Cooper, Sebastian Rupprecht, Thaddeus C Wright, Elizabeth E Neely, Michele Ferenci, Weimin Kang, Qing X Yang, Robert E Harbaugh, James R Connor, James McInerney
OBJECTIVE Intracranial aneurysms are vascular abnormalities associated with neurological morbidity and mortality due to risk of rupture. In addition, many aneurysm treatments have associated risk profiles that can preclude the prophylactic treatment of asymptomatic lesions. Gamma Knife radiosurgery (GKRS) is a standard treatment for trigeminal neuralgia, tumors, and arteriovenous malformations. Aneurysms associated with arteriovenous malformations have been noted to resolve after treatment of the malformation...
January 12, 2018: Journal of Neurosurgery
https://www.readbyqxmd.com/read/29327142/quality-of-life-and-disability-12-months-after-surgery-vs-conservative-management-for-unruptured-brain-arteriovenous-malformations-scottish-population-based-and-australian-hospital-based-studies
#14
Joan Margaret O'Donnell, Rustam Al-Shahi Salman, Maurizio Manuguerra, Nazih Assaad, Michael Kerin Morgan
BACKGROUND: Few data are available on disability and quality of life (QOL) after surgery versus conservative management for unruptured brain arteriovenous malformations (uAVMs). OBJECTIVE: The aim of this study was to test the hypothesis that QOL and disability are worse after surgery ± preoperative embolisation for uAVM compared with conservative management. METHODS: We included consecutive patients diagnosed with uAVM from a prospective population-based study in Scotland (1999-2003; 2006-2010) and a prospective hospital-based series in Australia (2011-2015)...
January 11, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29322721/mandibular-av-malformation-a-rare-cause-of-massive-bleeding-from-mouth-managed-with-multiple-vessel-embolization
#15
Rajeev Bhardwaj, Rajesh Sharma
An arteriovenous malformation (AVM) is a site of abnormal connectivity between arteries and veins. Arteriovenous malformations of jaw are extremely rare conditions that can result in disastrous complications, if handled carelessly. Although various treatment modalities have been advocated in the literature, there seems to be no complete consensus on a suitable treatment in these cases. We describe a case of mandibular AVM, who presented with massive bleeding from mouth and each time, embolization of one vessel was done, it recruited new vessel...
November 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/29313587/hereditary-haemorrhagic-telangiectasia-with-severe-anemia-and-recurrent-cns-infections
#16
Nrushen Peesapati, Pbpr Naidu, S Sunitha, P V Sivaram
Hereditary Haemorrhagic Telangiectasia, also known as Osler-Rendu-Weber disease is a rare autosomal dominant disorder affecting small vessels of multiple systems whose main pathological change is the presence of abnormal arteriovenous communications. Usually presents as skin and mucosal telangiectasias, epistaxis, gastrointestinal bleeding and visceral arteriovenous malformations. Although the epistaxis and gastrointestinal blood loss can result in anaemia, patients with hereditary haemorrhagic telangiectasia rarely presents as severe anaemia1 or CNS infections...
September 2017: Journal of the Association of Physicians of India
https://www.readbyqxmd.com/read/29313269/patient-specific-modeling-of-hemodynamics-supporting-surgical-planning-in-a-fontan-circulation-correction
#17
Theodorus M J van Bakel, Kevin D Lau, Jennifer Hirsch-Romano, Santi Trimarchi, Adam L Dorfman, C Alberto Figueroa
Computational fluid dynamics (CFD) is a modeling technique that enables calculation of the behavior of fluid flows in complex geometries. In cardiovascular medicine, CFD methods are being used to calculate patient-specific hemodynamics for a variety of applications, such as disease research, noninvasive diagnostics, medical device evaluation, and surgical planning. This paper provides a concise overview of the methods to perform patient-specific computational analyses using clinical data, followed by a case study where CFD-supported surgical planning is presented in a patient with Fontan circulation complicated by unilateral pulmonary arteriovenous malformations...
January 8, 2018: Journal of Cardiovascular Translational Research
https://www.readbyqxmd.com/read/29309977/usefulness-and-stability-of-intraoperative-digital-subtraction-angiography-using-the-trans-radial-route-in-arteriovenous-malformation-surgery
#18
Won Ki Yoon, Hoon Kim, Young Woo Kim, Seong Rim Kim, Ik Seong Park
OBJECTIVE: Digital subtraction angiography (DSA) is the gold standard to confirm complete removal of an AVM nidus. However, the trans-femoral approach requires specialized instrumentation and is cumbersome and difficult to perform with the patient in the prone or decubitus position. The authors report the use of intraoperative DSA (iDSA) with the trans-radial approach and examine its usefulness and safety. MATERIAL AND METHODS: We retrospectively reviewed clinical features, radiologic images, surgical findings, and iDSA findings of AVM patients who underwent nidus removal surgery...
January 5, 2018: World Neurosurgery
https://www.readbyqxmd.com/read/29309635/letter-radiation-induced-changes-after-stereotactic-radiosurgery-for-brain-arteriovenous-malformations
#19
Zengpanpan Ye, Xiaolin Ai, Chao You
No abstract text is available yet for this article.
December 22, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29307022/fluorescein-videoangiography-during-extracranial-to-intracranial-bypass-surgery-preliminary-results
#20
Alessandro Narducci, Julia Onken, Marcus Czabanka, Nils Hecht, Peter Vajkoczy
BACKGROUND: Over the last years, intraoperative use of fluorescein is gaining ground in the field of neurosurgery, due to development of a microscope-integrated YELLOW 560 module, with reported experiences in brain malignancies, aneurysms, and arteriovenous malformation surgery. The aim of this study is to determine the feasibility and value of fluorescein videoangiography during bypass procedures. METHODS: The authors enrolled 11 patients who underwent extracranial-to-intracranial bypass for moyamoya disease, atherosclerotic steno-occlusive cerebrovascular disease, and flow replacement during a giant middle cerebral artery (MCA) aneurysm treatment...
January 6, 2018: Acta Neurochirurgica
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