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Arterial venous malformation

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https://www.readbyqxmd.com/read/28735437/prospective-and-retrospective-study-of-videoconference-telemedicine-follow-up-after-elective-neurosurgery-results-of-a-pilot-program
#1
Melissa Reider-Demer, Pushpa Raja, Neil Martin, Mariel Schwinger, Diana Babayan
Existing literature suggests that use of telemedicine during postoperative appointments can increase access to care and is valued by patients and providers alike. While research examining the clinical equivalency of telemedicine visits for postoperative care has been growing, few studies have reported on telemedicine follow-up after neurosurgery. This study examined if a videoconferencing visit could substitute for an in-person clinic visit for elective neurosurgical cases in the USA. This was a single-center prospective study of patients who underwent elective neurosurgical procedures (aneurysm clipping, resection of cavernous angiomas, resection of arterial venous malformation, microvascular decompression for trigeminal neuralgia and hemifacial spasm, and certain benign brain tumors) and were offered telemedicine follow-up care by an allied health professional during the first 90 days after neurosurgery...
July 22, 2017: Neurosurgical Review
https://www.readbyqxmd.com/read/28735125/management-of-arteriovenous-malformations-associated-with-developmental-venous-anomalies-a-literature-review-and-report-of-two-cases
#2
Michael Zhang, Ian D Connolly, Mario K Teo, George Yang, Robert Dodd, Michael Marks, Mario Zuccarello, Gary K Steinberg
OBJECTIVE: Cerebrovascular malformation classification has revealed intermediary lesions that warrant further review due to their unusual presentation and management. We present two cases of arteriovenous malformations (AVMs) associated with a developmental venous anomaly (DVA), and discuss the efficacy of previously published management strategies. METHODS: Two cases of AVMs associated with DVA were identified and a literature search for published cases between 1980 and 2016 was conducted...
July 19, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28711531/transdural-indocyanine-green-videography-for-sta-mca-bypass-technical-note
#3
Hiroshi Yokota, Taiji Yonezawa, Tomonori Yamada, Seisuke Miyamae, Taekyun Kim, Yoshiaki Takamura, Katsuya Masui, Shuta Aketa
BACKGROUND: Neurosurgical application of indocyanine green (ICG) videography prior to performing a dural opening has been reported as transdural ICG videography and used during surgery of meningiomas associated with venous sinuses, as well as cranial and spinal arteriovenous malformations. However, its use for a superficial temporal artery to middle cerebral artery (STA-MCA) bypass has not been reported. METHODS: We performed a retrospective analysis of medical records of patients who underwent a transdural ICG videography technique during STA-MCA bypass procedures performed between January 2012 and March 2015...
July 12, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28696852/imaging-of-pregnancy-related-vascular-complications
#4
R Scooter Plowman, Cylen Javidan-Nejad, Constantine A Raptis, Douglas S Katz, Vincent M Mellnick, Sanjeev Bhalla, Patricia Cornejo, Christine O Menias
Pregnancy results in substantial hemodynamic and prothrombotic changes that form the foundation for downstream vascular complications, both during pregnancy and in the postpartum period. In addition, several important risk factors, including older patient age, diabetes, and smoking, can increase the risk for vascular-related pregnancy complications. Because radiologists often play an important role in evaluation of the pregnant patient, understanding the pathophysiology of vascular-related complications in pregnancy and their imaging appearances is essential for diagnostic accuracy...
July 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28691576/time-resolved-computed-tomography-angiography-in-the-evaluation-of-brain-arteriovenous-malformation-a-feasibility-study
#5
Rupinder Singh, Vivek Gupta, Chirag Ahuja, Niranjan Khandelwal
Background and purpose Digital subtraction angiography is the current gold standard for diagnosing as well as the follow-up of cerebral arteriovenous malformations. However, as it is invasive, relatively expensive and time-consuming, a non-invasive alternative is of interest. We aimed to evaluate the feasibility of time resolved computed tomography angiography (TR-CTA) in a series of five diagnosed cranial arteriovenous malformation patients, demonstrated by conventional digital subtraction angiography with respect to acquisition, depiction of angiographic phases and radiation exposure...
January 1, 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28684369/concomitant-lumbosacral-perimedullary-arteriovenous-fistula-and-spinal-dural-arteriovenous-fistula-a-case-report
#6
Jingwei Li, Guilin Li, Lisong Bian, Tao Hong, Jiaxing Yu, Hongqi Zhang, Feng Ling
BACKGROUND: and Importance Although multifocal spinal arteriovenous malformations (SAVMs) have been reported before, the present case is the first case of two different types, including perimedullary arteriovenous fistula (PMAVF) and spinal dural arteriovenous fistulas (SDAVFs) of lumbosacral arteriovenous malformations (AVMs), coexisting in one patient. We also report the use of hybrid techniques in the treatment of concomitant lumbosacral SAVMs for the first time. CLINICAL PRESENTATION: A 65-year-old man presented with a 4-year history of progressive sensory, motor, and sphincter dysfunction...
July 3, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28683898/color-doppler-ultrasound-study-of-glomuvenous-malformations-with-its-clinical-and-histologic-correlations
#7
X Wortsman, F Millard, L Aranibar
Glomuvenous malformations are hamartomatous lesions characterized by the presence of glomus cells in the vascular smooth muscle. We present the clinical and color Doppler ultrasound features of a series of 13 cases of histologically confirmed glomuvenous malformations. In all cases, the ultrasound study revealed moderately delimited superficial dermal and hypodermal pseudonodular structures of mixed echogenicity, with hypoechoic and heterogeneous areas and anechoic, pseudocystic tubular and lacunar zones. Arterial and venous vessels, mainly with a low flow (≤ 15cm/s) were observed in 85% of patients, but no arteriovenous shunts were present...
July 3, 2017: Actas Dermo-sifiliográficas
https://www.readbyqxmd.com/read/28680585/pulmonary-thromboendarterectomy-in-the-setting-of-a-mediastinal-venous-malformation-with-a-congenitally-absent-left-subclavian-vein
#8
Vickram Tejwani, Karunakaravel Karuppasamy, Marcelo P Gomes, Abraham Levitin, James M Luethke, Christopher J Morin, Nicholas G Smedira, Gustavo A Heresi, Wayne F Yakes
Venous malformations have static venous lakes that predispose to spontaneous venous thrombosis within the malformation due to its low-flow static state. Thrombi of varying sizes can then embolize continually into the pulmonary arterial circulation, and occlude and narrow elastic pulmonary arteries causing chronic thromboembolic pulmonary hypertension (CTEPH). Pulmonary thromboendarterectomy (PTE) is potentially curative in CTEPH, but has not been previously reported in the setting of mediastinal and chest wall venous malformations...
March 2017: Pulmonary Circulation
https://www.readbyqxmd.com/read/28669271/lateral-parietal-arteriovenous-malformation-with-feeding-artery-aneurysm
#9
Ashish H Shah, Anthony C Wang, Jacques J Morcos
Superficial arteriovenous malformations (AVMs) with favorable Spetzler-Martin grading are amenable to primary surgical resection. Careful preoperative workup including preoperative angiograms is essential to identify feeding artery aneurysms and deep venous drainage. The authors present a 37-year-old female who presented with a Spetzler-Martin Grade II right parietal superficial AVM with a 5-mm feeding artery aneurysm from the posterior cerebral artery. Given the risk of hemorrhage, the AVM was resected completely without any complications...
July 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28669264/surgical-treatment-of-a-complex-grade-iii-spetzler-martin-posterior-temporal-arteriovenous-malformation
#10
Amrit Chiluwal, Amir R Dehdashti
Grade III Spetzler-Martin arteriovenous malformations (AVMs) are a distinct subgroup of brain AVMs. Their variety in terms of location, type of venous drainage, and size makes them the most heterogenous group in the AVM classification. The surgical risk of treatment is also variable depending on the specifics of a given Grade III AVM. In this video illustration, the authors describe the technical nuances of surgical resection of a very complex Grade III left posterior temporal AVM. According to supplementary grading, the unruptured aspect and patient age give this lesion a Grade III; therefore, the combined grading gives the patient a score of 6, which puts him at moderate risk of morbidity for surgery...
July 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28669262/the-paramedian-supracerebellar-transtentorial-approach-to-remove-a-posterior-fusiform-gyrus-arteriovenous-malformation
#11
Mehmet Volkan Harput, Uğur Türe
This is the case of a 14-year-old female who presented with headache and seizures. Cranial magnetic resonance imaging revealed an arteriovenous malformation (AVM) located at the posterior portion of the right-sided fusiform gyrus. Cerebral angiography showed that the AVM was fed mainly by branches from the inferior temporal trunk of the posterior cerebral artery. The main venous drainage was to the right transverse sinus through the tentorial vein. The AVM was totally excised through the paramedian supracerebellar-transtentorial approach with the patient in a semisitting position...
July 2017: Neurosurgical Focus
https://www.readbyqxmd.com/read/28637821/endovascular-management-of-aneurysms-associated-with-spinal-arteriovenous-malformations
#12
Sung Chul Jung, Yunsun Song, Su Hee Cho, Joonggoo Kim, Seung Yeon Noh, Sang Hun Lee, Jae Jon Sheen, Seung Chul Rhim, Sang Ryong Jeon, Dae Chul Suh
BACKGROUND: Spinal aneurysms are rare among spinal arteriovenous malformations (SAVMs). There are few reports of endovascular management of spinal aneurysms associated with SAVM. OBJECTIVE: To present endovascular management of aneurysms associated with SAVM. METHODS: Of 91 patients with SAVMs,eight (9%) presented with aneurysms. Of these, three were male and five were female with a median age of 18 years (range 11-38). We evaluated the presenting pattern, lesion level, type of the target aneurysm related to the presenting pattern and AVM nidus, and the result obtained after embolization or open surgery...
June 21, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28599054/coexistence-of-ephb1-and-ephrinb2-in-port-wine-stain-endothelial-progenitor-cells-contributes-to-clinicopathological-vasculature-dilatation
#13
W Tan, J Wang, F Zhou, L Gao, Y Rong, H Liu, A Sukanthanag, G Wang, M C Mihm, D-B Chen, J S Nelson
Port wine stain (PWS) is a vascular malformation characterized by a progressive dilatation of post-capillary venules, but the molecular pathogenesis remains obscure. We hypothesized that PWS endothelial cells (ECs) present a unique molecular phenotype that lead to pathoanatomic PWS vasculatures. We herein show multiple clinicopathologic features of PWS blood vessels during the development and progression of the disease. 1) There were no normal arterioles and venules phenotypically and morphologically observed in PWS skin; both arterioles and venules showed differentiation impairments, resulting in a reduction of arteriole-like vasculatures and defects in capillary loop formation in PWS lesions...
June 9, 2017: British Journal of Dermatology
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
#14
Alessandro Pedicelli, Marta Iacobucci, Paolo Frassanito, Emilio Lozupone, Gabriele Masselli, Concezio Di Rocco, Cesare Colosimo
BACKGROUND: 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, very rarely are diagnosed in utero, because of a lack of understanding of the condition and because they may be hard to visualize. CASE DESCRIPTION: We report a rare case of a mass-effect PAVF diagnosed with fetal magnetic resonance imaging, involving the right cerebral hemisphere, fed by a pericallosal artery and associated with a giant venous dilatation...
August 2017: World Neurosurgery
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/28552148/arteriovenous-malformations-epidemiology-clinical-presentation-and-diagnostic-evaluation
#16
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/28552141/spinal-arteriovenous-fistulae-surgical-management
#17
Arthur L Day, Ali Hassoun Turkmani, P Roc Chen
Spinal vascular malformations include several types of pathologic entities with multiple variations in their neurologic presentation and risks. Spinal dural arteriovenous fistulae (SDAVF) are the most frequent type, and account for 70% of all lesions affecting the spinal cord. The nonspecific early neurologic symptoms of SDAVF often make early diagnosis of this clinical entity challenging, and a delay in diagnosis or appropriate treatment often has devastating consequences on spinal cord function. The lesion can invariably be obliterated with surgical occlusion of the intradural arterialized venous reflux, and progression of neurologic deficits is usually arrested and sometimes reversed...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28552137/the-natural-history-of-cerebral-arteriovenous-malformations
#18
Anil Can, Bradley A Gross, Rose Du
Cerebral arteriovenous malformations (AVMs) are composed of a complex tangle of abnormal arteries and veins and are a significant source of cerebral hemorrhage and consequent morbidity and mortality in young adults, representing a diagnostic and therapeutic challenge. Current natural-history studies of cerebral AVMs report overall annual rates of 1% and 3% for the risk of epilepsy and hemorrhage, respectively. Unruptured AVMs have an annual hemorrhage rate of 2.2% while ruptured lesions have an annual hemorrhage rate of 4...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28552134/radiosurgery-for-dural-arteriovenous-malformations
#19
Conor Grady, Carolina Gesteira Benjamin, Douglas Kondziolka
Intracranial dural arteriovenous malformations (DAVFs) are relatively uncommon vascular lesions characterized by the direct connection of dural arteries into dural venous sinuses or leptomeningeal veins. Strategies for the treatment of these complex lesions have evolved significantly over the past three decades, and include open surgical disconnection, endovascular embolization, stereotactic radiosurgery (SRS), or a combination of these approaches. Radiosurgical intervention is unique in offering significant benefits to patients while exposing them to few of the risks associated with more invasive interventions...
2017: Handbook of Clinical Neurology
https://www.readbyqxmd.com/read/28552133/endovascular-management-of-intracranial-dural-arteriovenous-fistulas
#20
Celene B Mulholland, M Yashar S Kalani, Felipe C Albuquerque
Dural arteriovenous fistulas are a heterogeneous group of lesions that comprise 10-15% of intracranial vascular malformations. The treatment strategy is devised after careful consideration of the arterial supply, venous drainage, clinical presentation, and risk of progression, hemorrhage, or neurologic decline. With recent advancements in endovascular technology, the majority of dural arteriovenous fistulas can be treated with either transarterial or transvenous embolization. Those that cannot be fully treated by endovascular means are approached with either adjuvant surgery or radiotherapy...
2017: Handbook of Clinical Neurology
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