keyword
MENU ▼
Read by QxMD icon Read
search

Arterial venous malformation

keyword
https://www.readbyqxmd.com/read/28530660/endoglin-prevents-vascular-malformation-by-regulating-flow-induced-cell-migration-and-specification-through-vegfr2-signalling
#1
Yi Jin, Lars Muhl, Mikhail Burmakin, Yixin Wang, Anne-Claire Duchez, Christer Betsholtz, Helen M Arthur, Lars Jakobsson
Loss-of-function (LOF) mutations in the endothelial cell (EC)-enriched gene endoglin (ENG) cause the human disease hereditary haemorrhagic telangiectasia-1, characterized by vascular malformations promoted by vascular endothelial growth factor A (VEGFA). How ENG deficiency alters EC behaviour to trigger these anomalies is not understood. Mosaic ENG deletion in the postnatal mouse rendered Eng LOF ECs insensitive to flow-mediated venous to arterial migration. Eng LOF ECs retained within arterioles acquired venous characteristics and secondary ENG-independent proliferation resulting in arteriovenous malformation (AVM)...
May 22, 2017: Nature Cell Biology
https://www.readbyqxmd.com/read/28524790/cognard-type-v-intracranial-dural-arteriovenous-fistula-presenting-in-a-pediatric-patient-with-rapid-progressive-myelopathy
#2
Walter J Jermakowicz, Alexander G Weil, Artyom Vlasenko, Sanjiv Bhatia, Toba N Niazi
Cognard Type V dural arteriovenous fistulas (dAVFs) are a unique type of cranial vascular malformation characterized by congestion of the perimedullary venous system that may lead to devastating spinal cord pathology if left untreated. The authors present the first known case of a pediatric patient diagnosed with a Type V dAVF. A 14-year-old girl presented with a 3-week history of slowly progressive unilateral leg weakness that quickly progressed to bilateral leg paralysis, sphincter dysfunction, and complete sensory loss the day of her presentation...
May 19, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28491192/a-case-report-of-spinal-dural-arteriovenous-fistula-origins-determinants-and-consequences-of-abnormal-vascular-malformations
#3
Sherry M Zakhary, Christopher L Hoehmann, Joshua A Cuoco, Kyle Hitscherich, Hamid Alam, German Torres
A spinal dural arteriovenous fistula is an abnormally layered connection between radicular arteries and venous plexus of the spinal cord. This vascular condition is relatively rare with an incidence of 5-10 cases per million in the general population. Diagnosis of spinal dural arteriovenous fistula is differentiated by contrast-enhanced magnetic resonance angiography or structural magnetic resonance imaging, but a definitive diagnosis requires spinal angiography methods. Here, we report a case of a 67-year-old female with a spinal dural arteriovenous fistula, provide a pertinent clinical history to the case nosology, and discuss the biology of adhesive proteins, chemotactic molecules, and transcription factors that modify the behavior of the vasculature to possibly cause sensorimotor deficits...
June 2017: Radiology case reports
https://www.readbyqxmd.com/read/28457930/delayed-venous-drainage-in-ruptured-arteriovenous-malformations-based-on-quantitative-color-coded-digital-subtraction-angiography
#4
Jan-Karl Burkhardt, Xiaolin Chen, Ethan A Winkler, Daniel L Cooke, Helen Kim, Michael T Lawton
OBJECTIVE: Clinically applicable hemodynamic risk factors to predict arteriovenous malformation (AVM) rupture are missing in the literature. The aim of this study was to identify hemodynamic parameters in ruptured and unruptured AVMs based on catheter angiography. METHODS: Patients with frontal and temporal AVMs and Siemens syngo iFlow color-coding angiography were included in this study (n=71). Clinical and radiological data (age, gender, Spetzler-Martin (SM) and supplemented SM grade, and rupture status), and hemodynamic features (contrast mean transit time (MTT) of feeding arteries, draining veins, AVM nidus, and the cerebral circulation time (CCT)) were analyzed...
April 27, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28440519/-prevention-diagnosis-and-treatment-of-perioperative-complications-of-bariatric-and-metabolic-surgery
#5
Haifu Wu, Ming Zhong, Di Zhou, Chenye Shi, Heng Jiao, Wei Wu, Xinxia Chang, Jing Cang, Hua Bian
Surgical operation in treating obesity and type 2 diabetes is popularizing rapidly in China. Correct prevention and recognition of perioperation-related operative complications is the premise of ensuring surgical safety. Familiar complications of the operation include deep venous thrombosis, pulmonary artery embolism, anastomotic bleeding, anastomotic fistula and marginal ulcer. The prevention of deep venous thrombosis is better than treatment. The concrete measures contain physical prophylaxis (graduated compression stocking and intermittent pneumatic compression leg sleeves) and drug prophylaxis (unfractionated heparin and low molecular heparin), and the treatment is mainly thrombolysis or operative thrombectomy...
April 25, 2017: Zhonghua Wei Chang Wai Ke za Zhi, Chinese Journal of Gastrointestinal Surgery
https://www.readbyqxmd.com/read/28422344/use-of-blood-pool-agents-with-steady-state-mri-to-assess-the-vascular-system
#6
Avnesh S Thakor, John Chung, Premal Patel, Anthony Chan, Amdad Ahmed, Graeme McNeil, David M Liu, Bruce Forster, Darren Klass
Over the past two decades there have been significant advances in the use of magnetic resonance imaging (MRI) to assess the vascular system. New imaging sequences and improvements in magnet design have enabled the creation of higher spatial resolution images. MRI is now a viable alternative imaging modality when compared to both invasive angiography and computed tomographic angiography. The use of blood pool agents has further facilitated the use of MR angiography (MRA); their high molecular weight allows for lower doses of contrast medium administration while their prolonged presence in the blood stream allows for repeated high-quality volumetric imaging of both the arterial and venous circulation...
April 19, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28411709/chronic-refractory-venous-ulcer-exacerbated-by-a-congenital-pelvic-arteriovenous-malformation-successfully-treated-by-transarterial-onyx-embolization
#7
Naiem Nassiri, Dustin T Crystal, Catherine Hoyt, Randy Shafritz
Congenital arteriovenous malformations (AVMs) are an important but often neglected cause of lower extremity venous hypertension. A case of a chronic refractory venous stasis ulcer of the lower extremity exacerbated by a pelvic AVM is presented. Healing of the ulcer was achieved at 2 months without recurrence at 1 year after superselective ethylene vinyl alcohol copolymer (Onyx 34; ev3, Covidien, Plymouth, Minn) embolization of the AVM nidus. Chronic venous arterialization should be considered in cases of refractory, nonhealing venous ulcers...
May 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28410939/acute-hand-ischemia-following-elective-venous-sclerotherapy-for-dorsal-hand-varicose-veins
#8
Steven M Andelman, Amanda L Walsh, Todd A Rubin, Michael R Hausman
Venous sclerotherapy is an emerging cosmetic treatment option for dorsal hand varicose veins. Although venous sclerotherapy is considered a safe and effective procedure for treatment of venous malformations and varicosities in both the upper and lower extremities, inadvertent injection of the sclerosing agent into the arterial system has led to reported instances of acute ischemic events and distal limb necrosis. This is a rare but well-documented complication of lower-extremity venous sclerotherapy. Only 2 cases have been reported in upper-extremity venous sclerotherapy, both of which occurred during treatment of complex vascular malformations...
April 12, 2017: Journal of Hand Surgery
https://www.readbyqxmd.com/read/28402473/cavernous-malformation-associated-with-arterialized-developmental-venous-anomaly-a-case-report
#9
Kenta Nakase, Yasushi Motoyama, Tokiko Nakai, Yasuhiro Takeshima, Ichiro Nakagawa, Young-Su Park, Chiho Ohbayashi, Hiroyuki Nakase
BACKGROUND AND IMPORTANCE: Formation of cavernous malformations (CMs) has been recognized to be associated with developmental venous anomaly (DVA) by many authors. Hemodynamic stress due to venous outflow restriction could be hypothesized as a cause. On the other hand, a rare subgroup of DVA with an arterial component has been reported as likely to hemorrhage or be symptomatic. Cases of arterialized DVAs reported previously have not been associated with the presence of CM. CLINICAL PRESENTATION: We present herein a case report of arterialized DVA in the brainstem with repeated cerebellar hemorrhage...
June 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28396981/multiple-variations-of-the-cerebral-arteries-associated-with-tetralogy-of-fallot-a-case-report
#10
Akira Uchino, Naoko Saito, Eito Kozawa, Satoshi Masutani
Tetralogy of Fallot (TOF) can be associated with vascular malformations or variations, especially of the aortic arch or supracardiac major venous systems. We report its association with an extremely rare combination of three such variations of the cerebral arteries-a right persistent hypoglossal artery, an extremely rare left carotid-right anterior cerebral artery (ACA) anastomosis, and a left accessory middle cerebral artery arising from the A1-A2 junction of the left ACA-which were diagnosed by magnetic resonance angiography in a 9-year-old girl during evaluation of multiple acute cerebral infarctions...
April 10, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28368503/contribution-of-endothelial-to-mesenchymal-transition-to-the-pathogenesis-of-human-cerebral-and-orbital-cavernous-malformations
#11
Shigeki Takada, Masato Hojo, Kenji Tanigaki, Susumu Miyamoto
BACKGROUND: The analysis of gene-targeted mouse mutants has demonstrated that endothelial-to-mesenchymal transition (EndMT) is crucial to the onset and progression of cerebral cavernous malformations (CMs). It has also been shown that Notch and ephrin/Eph signaling are involved in EndMT. However, their roles in the pathogenesis of human intracranial CMs remain unclear. OBJECTIVE: To elucidate the contribution of EndMT, the Notch pathway, and ephrin-B2/EphB4 signaling to the pathogenesis of human intracranial CMs...
March 28, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28341499/renal-arteriovenous-malformations-a-rare-vascular-cause-of-back-pain
#12
Tazo Inui, David Frankel
OBJECTIVE: Renal arteriovenous malformation (AVM) is a very rare phenomenon (fewer than 200 cases in the literature), most commonly (75%) presenting with hematuria in young women. Renal AVMs may be cirsoid (multi-branched) or cavernous, with cirsoid morphology predominating 3:1. The historical treatment is partial nephrectomy. Best endovascular therapy is divided among many options. We present 2 cases of large renal AVMs treated with single Amplatzer plugs. METHODS: During a 2-year period (2014-15), 2 patients presented for vascular evaluation of renal AVMs found incidentally on workup for non-specific abdominal and back pain...
March 21, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28324193/hemodynamic-characterization-of-peripheral-arterio-venous-malformations
#13
Sabrina Frey, A Haine, R Kammer, H von Tengg-Kobligk, D Obrist, I Baumgartner
Peripheral arterio-venous malformations (pAVMs) are congenital vascular anomalies that require treatment, due to their severe clinical consequences. The complexity of lesions often leads to misdiagnosis and ill-planned treatments. To improve disease management, we developed a computational model to quantify the hemodynamic effects of key angioarchitectural features of pAVMs. Hemodynamic results were used to predict the transport of contrast agent (CA), which allowed us to compare our findings to digital subtraction angiography (DSA) recordings of patients...
June 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28289757/optimization-of-the-surgical-approach-in-avms-using-mri-and-4d-dsa-fusion-technique-a%C3%A2-technical-note
#14
S Tritt, B Ommer, S Gehrisch, S Klein, V Seifert, J Berkefeld, J Konczalla
PURPOSE: Previously published data demonstrated the possibility of displaying the angioarchitecture of intracranial vascular malformations using time-resolved 3D imaging (4D digital subtraction angiography [DSA]). The purpose of our study was to prove the technical feasibility of creating fused images of time-resolved 3D reconstructions and MPRAGE MRI data sets and to check the reliability of the correct anatomical display of the angioma nidus and the venous drainage in the fused images of patients with intracranial arteriovenous malformations (AVM)...
March 13, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28285838/incidental-findings-on-pediatric-abdominal-magnetic-resonance-angiography
#15
Nattinee Leelakanok, Matthew A Zapala, Emily A Edwards, Andrew S Phelps, John D Mackenzie, Jesse Courtier
RATIONALE AND OBJECTIVES: Abdominal magnetic resonance angiography (MRA) has gained favor in pediatric patients owing to its lack of ionizing radiation and noninvasive nature. Reports exist regarding incidental findings on body MRA in adult patients. However, the incidental findings in pediatric abdominal MRA have not been previously reported. Our study aims to determine the frequencies, characteristics, and categories of incidental findings in pediatric patients undergoing abdominal MRA...
March 9, 2017: Academic Radiology
https://www.readbyqxmd.com/read/28266961/thoracic-manifestations-of-klippel-trenaunay-syndrome
#16
Mark M Hammer, Wallace T Miller
Klippel-Trenaunay syndrome (KTS) is a congenital disorder characterized by venous malformations and a predisposition to pulmonary embolism. We reviewed the imaging findings of 7 adult patients with KTS who underwent thoracic CT. While the superficial manifestations of KTS predominantly affect the extremities, patients frequently develop abnormalities of the pulmonary arterial system, particularly chronic thromboembolic pulmonary hypertension. Additionally, some patients are seen to develop pulmonary arteriolar aneurysms; the physiologic significance of this finding is unknown at this time...
May 2017: Journal of Thoracic Imaging
https://www.readbyqxmd.com/read/28265215/nonfluoroscopic-imaging-as-guidance-for-radiofrequency-ablation-of-atrioventricular-nodal-reentrant-tachycardia-after-mustard-repair
#17
Jan Hluchy, Dinh Q Nguyen, Henrik Sobczak, Bodo Brandts
Most tachycardias in the pulmonary venous atrium are inaccessible by direct means and require either a retrograde approach or a transseptal approach for ablation. We present a case in which successful radiofrequency ablation of common atrioventricular nodal reentrant tachycardia was accomplished via a retrograde transaortic approach guided by nonfluoroscopic mapping with use of the NavX(™) mapping system. The patient was a 49-year-old woman who at the age of 4 years had undergone Mustard repair for complete dextrotransposition of the great arteries...
February 2017: Texas Heart Institute Journal
https://www.readbyqxmd.com/read/28235955/validation-of-cerebral-arteriovenous-malformation-hemodynamics-assessed-by-dsa-using-quantitative-magnetic-resonance-angiography-preliminary-study
#18
Sophia F Shakur, Denise Brunozzi, Ahmed E Hussein, Andreas Linninger, Chih-Yang Hsu, Fady T Charbel, Ali Alaraj
BACKGROUND: The hemodynamic evaluation of cerebral arteriovenous malformations (AVMs) using DSA has not been validated against true flow measurements. OBJECTIVE: To validate AVM hemodynamics assessed by DSA using quantitative magnetic resonance angiography (QMRA). MATERIALS AND METHODS: Patients seen at our institution between 2007 and 2016 with a supratentorial AVM and DSA and QMRA obtained before any treatment were retrospectively reviewed...
February 24, 2017: Journal of Neurointerventional Surgery
https://www.readbyqxmd.com/read/28203571/evolutionary-history-of-multiple-dural-fistula
#19
Braulio Martinez-Burbano, Edgar Patricio Correa Diaz, Carolina Jácome Sánchez
Intracranial dural arteriovenous fistulas (DAVFs) are abnormal communications between arteries and veins or dural venous sinuses, which sit between the sheets of the dura. They represent 10% to 15% of intracranial vascular malformations. Clinical manifestations and prognosis depend on the pattern of venous drainage and location. The clinical presentation of DAVF may be mistaken for vascular or nonvascular brain pathologies. For that reason, within the differential diagnosis come a wide range of conditions, such as secondary headaches, encephalopathies, dementias including those with rapid progression, neurodegenerative diseases, inflammatory processes, or tumors typically at the orbital level or in the cavernous sinus...
October 2016: Journal of Investigative Medicine High Impact Case Reports
https://www.readbyqxmd.com/read/28194506/treatment-of-type-ii-endoleaks-with-a-novel-agent-precipitating-hydrophobic-injectable-liquid-phil
#20
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
keyword
keyword
101908
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"