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Arteriovenous fistula

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https://www.readbyqxmd.com/read/28719480/a-rare-pediatric-case-of-posttraumatic-pseudoaneurysm-case-report-and-literature-review
#1
Ada Gu, April J Kam
Posttraumatic pseudoaneurysms are extremely rare in pediatric populations. In many cases, pseudoaneurysms may be confused with abscesses, epidermoid cysts, arteriovenous fistula, foreign objects, and ganglion cysts, as well as tumors. They are associated with distinguishing findings of "pulsatile mass, a palpable thrill, and an audible to-and-fro murmur" (1), which can be confirmed by various imaging techniques. In this report, we describe the case of a 4-year-old boy who presented to the pediatric emergency department 3 weeks after falling and subsequently getting cut by glass...
July 17, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28716281/-black-butterfly-sign-on-t2-weighted-and-susceptibility-weighted-imaging-a-novel-finding-of-chronic-venous-congestion-of-the-brain-stem-and-spinal-cord-associated-with-dural-arteriovenous-fistulas
#2
Mikako Enokizono, Noriko Sato, Minoru Morikawa, Yukio Kimura, Atsuhiko Sugiyama, Tomoko Maekawa, Daichi Sone, Daiki Takewaki, Tomoko Okamoto, Yuji Takahashi, Nobutaka Horie, Takayuki Matsuo
A dural arteriovenous fistula (DAVF) with spinal perimedullary venous drainage can cause progressive myelopathy, and it is sometimes incorrectly diagnosed as another spinal cord disease. Here we report the cases of three individuals with a DAVF (one craniocervical junction DAVF and two tentorial DAVFs) with progressive myelopathy showing unique magnetic resonance (MR) imaging findings. MR T2*WI or susceptibility-weighted imaging (SWI) demonstrated symmetrical dark signal intensity lesions predominantly in the dorsal aspect of medulla and the central gray matter of cervical spinal cord that showed the "black butterfly" silhouette...
August 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/28713907/roles-of-mir%C3%A2-4463-in-h2o2%C3%A2-induced-oxidative-stress-in-human-umbilical-vein-endothelial-cells
#3
Xueqin Wang, Xuemei He, Xian Deng, Yanzheng He, Xiangyu Zhou
Oxidative stress is implicated in the pathophysiology of vascular diseases, including atherosclerosis, aneurysm and arteriovenous fistula. A previous study from our lab suggested that microRNA (miR)‑4463 may be involved in the pathogenesis of vascular disease; however, the roles of oxidative stress in the molecular mechanisms underlying the actions of miR‑4463 in vascular disease have yet to be elucidated. The aim of the present study was to investigate the role of miR‑4463 in hydrogen peroxide (H2O2)‑induced oxidative stress in human umbilical vein endothelial cells (HUVECs)...
July 15, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28712898/iatrogenic-vertebral-artery-injury-during-anterior-cervical-spine-surgery-a-systematic-review
#4
REVIEW
Qing Guan, Long Chen, Ye Long, Zhou Xiang
BACKGROUND: Iatrogenic vertebral artery injury (VAI) during anterior cervical surgery is rare but potentially catastrophic. METHOD: The causes, presentation, diagnosis, management, prognosis, and prevention of VAI were reviewed following Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines. English-language studies and case reports published from 1980 to 2017 were retrieved. Data on diagnosis, surgical procedures and approach, site and cause of VAI, management, outcomes, and VA status were extracted...
July 13, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28711532/an-intraoperative-look-at-a-residual-recurrent-tentorial-dural-arteriovenous-fistula
#5
Bradley A Gross, Andrew F Ducruet, Brian T Jankowitz, Paul A Gardner
BACKGROUND: Dural arteriovenous fistulas (dAVF)s are often treated via transarterial or transvenous embolization. Incomplete penetration of the draining vein/occult residual will often become apparent on follow-up angiography, requiring repeat embolization, or at times, surgical resection. CASE DESCRIPTION: A 41 year old female presented with cerebellar hemorrhage from a tentorial dAVF treated with transvenous coil embolization. Follow-up angiography disclosed a residual/recurrent fistula treated with transvenous Onyx embolization...
July 12, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28710091/intimal-hyperplasia-stenosis-and-arteriovenous-fistula-maturation-failure-in-the-hemodialysis-fistula-maturation-study
#6
Alfred K Cheung, Peter B Imrey, Charles E Alpers, Michelle L Robbin, Milena Radeva, Brett Larive, Yan-Ting Shiu, Michael Allon, Laura M Dember, Tom Greene, Jonathan Himmelfarb, Prabir Roy-Chaudhury, Christi M Terry, Miguel A Vazquez, John W Kusek, Harold I Feldman
Intimal hyperplasia and stenosis are often cited as causes of arteriovenous fistula maturation failure, but definitive evidence is lacking. We examined the associations among preexisting venous intimal hyperplasia, fistula venous stenosis after creation, and clinical maturation failure. The Hemodialysis Fistula Maturation Study prospectively observed 602 men and women through arteriovenous fistula creation surgery and their postoperative course. A segment of the vein used to create the fistula was collected intraoperatively for histomorphometric examination...
July 14, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28710090/the-clinical-and-economic-effect-of-vascular-access-selection-in-patients-initiating-hemodialysis-with-a-catheter
#7
Alian Al-Balas, Timmy Lee, Carlton J Young, Jeffrey A Kepes, Jill Barker-Finkel, Michael Allon
Patients in the United States frequently initiate hemodialysis with a central venous catheter (CVC) and subsequently undergo placement of a new arteriovenous fistula (AVF) or arteriovenous graft (AVG). Little is known about the clinical and economic effects of initial vascular access choice. We identified 479 patients starting hemodialysis with a CVC at a large medical center (during 2004-2012) who subsequently had an AVF (n=295) or AVG (n=105) placed or no arteriovenous access (CVC group, n=71). Compared with patients receiving an AVG, those receiving an AVF had more frequent surgical access procedures per year (1...
July 14, 2017: Journal of the American Society of Nephrology: JASN
https://www.readbyqxmd.com/read/28708199/management-of-transposed-arteriovenous-fistula-swing-point-stenosis-at-the-basilic-vein-angle-of-transposition-by-stent-grafts
#8
George M Nassar, Gerald Beathard, Edward Rhee, Abdul Jabbar Khan, Binh Nguyen
INTRODUCTION: Transposed basilic vein arteriovenous fistulas suffer from stenosis at their basilic angle of transposition (BAT). This lesion exhibits frequent recurrence after angioplasty. The primary goal of this study was to determine the effect of stent-graft placement on BAT lesion- and access-patency. The secondary goals were to determine the frequency of intervention pre- and post-stent placement and stent-associated stenosis. METHODS: Thirty-seven cases had stent-grafts placed at their BAT to manage stenosis...
July 5, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28705447/-post-traumatic-concomitant-popliteal-artery-pseudoaneurysm-and-arteriovenous-fistula
#9
O Zizi, H Naouli, H Jiber, A Bouarhroum
Popliteal injuries are well known to be serious with a high rate of mortality due to damage caused to popliteal vessels. Pseudoaneurysm formation and arteriovenous fistulas are well-known complications of arterial injury, but are rarely concomitant. Diagnosis is usually done by computed tomography (CT) angiography. Treatment strategies consist of surgery or endovascular management. We report the surgical treatment of two cases of popliteal arteriovenous fistula associated with pseudoaneurysm complicating stab wounds...
February 2017: J Med Vasc
https://www.readbyqxmd.com/read/28705077/fifty-years-of-hemodialysis-access-literature-the-fifty-most-cited-publications-in-the-medical-literature
#10
Edvard Skripochnik, David J O'Connor, Eric B Trestman, Evan C Lipsitz, Larry A Scher
Objectives The modern era of hemodialysis access surgery began with the publication in 1966 by Brescia et al. describing the use of a surgically created arteriovenous fistula. Since then, the number of patients on chronic hemodialysis and the number of publications dealing with hemodialysis access have steadily increased. We have chronicled the increase in publications in the medical literature dealing with hemodialysis access by evaluating the characteristics of the 50 most cited articles. Methods We queried the Science Citation Index from the years 1960-2014...
January 1, 2017: Vascular
https://www.readbyqxmd.com/read/28702116/management-of-aggressive-cerebral-dural-arteriovenous-fistulae-experience-using-endovascular-embolization
#11
Rajeev Sivasankar, Raju Augustine George, Rochan Pant, Samresh Sahu, Rohit Aggarwal, Aftab Alam
No abstract text is available yet for this article.
June 2017: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/28702115/staged-arterial-and-venous-embolizations-in-treatment-of-type-iv-intraosseous-dural-arteriovenous-fistula
#12
Aleksandra V Betcher, Andrew W Schnure, Paul H Janda, Rajneesh Agrawal, Amandeep Dhillon
OBJECTIVE: This is a case report of an adult male with complex type IV intraosseous DAVF causing severe venous hypertension and bony destruction, presenting with severe hemotympanum, and a novel way of staged arterial and venous embolizations to treat the emergent symptoms. METHODS: First and second stages were direct selective arterial embolizations using Onyx liquid agent. Goal was to reduce flow into the fistula by embolizing the feeder branch and distal penetration of the nidus with Onyx...
June 2017: Journal of Vascular and Interventional Neurology
https://www.readbyqxmd.com/read/28700182/-brachial-artery-pseudoaneurysm-a-rare-but-serious-complication-in-hemodialysis-patients-with-arteriovenous-fistula
#13
Andrea Mancini, Giuseppe Castriotta, Pernina Angelini, Michele Bozzi, Vincenzo Giancaspro, Elvira La Raia, Maria Teresa Nisi, Anna Rita Proscia, Giuseppe Tarantino, Ottavia Vitale, Cristoforo Cuzzola
A pseudoaneurysm or false aneurysm of the brachial artery is an uncommon occurrence in patients receiving hemodialysis with arteriovenous fistula (AVF). We describe the case of a 76-year-old woman presenting with a large, tender, pulsatile mass in the right antecubital region 10 cm from the AVF. B-mode ultrasound examination revealed a saccular hematoma. Color doppler showed a recirculation movement of blood, creating a two colors image called "Korean flag". The patient was transferred to the surgical unit where she first underwent ultrasound-guided compression and then surgical repair of the pseudoaneurysm...
June 2017: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/28700165/-complications-and-management-of-percutaneous-femoral-arterial-access
#14
Fatima Mahhou-Sennouni, Helia Robert-Ebadi, Marc Righini, Frédéric Glauser
Vascular access complications following endovascular procedures remain an important cause of morbidity when using a femoral approach. In this review, we describe the risk factors, clinical presentation and management of hematoma, retroperitoneal bleeding, pseudoaneurysms, arteriovenous fistulae and arterial thrombosis.
December 7, 2016: Revue Médicale Suisse
https://www.readbyqxmd.com/read/28698085/modified-park-bench-position-for-superior-vermian-arteriovenous-malformations-and-dural-fistulas
#15
Rouzbeh Motiei-Langroudi, Christoph J Griessenauer, Abdulrahman Y Alturki, Paul H Chapman, Christopher S Ogilvy, Ajith J Thomas
OBJECTIVES: Arteriovenous malformations (AVMs) of the superior cerebellar vermis and dural arteriovenous fistulas (dAVFs) draining into tentorial venous structures are uncommon lesions. Various surgical approaches and positions have been used to gain access. METHODS: We present our experience with 10 superior vermian AVMs and 3 dAVFs with retrograde transverse sinus or torcular drainage, each resected through a supracerebellar infratentorial approach in park bench position with modification of the neck and head position (vertex tilt-up instead of down)...
July 8, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28697694/midterm-outcomes-from-a-pilot-study-of-percutaneous-deep-vein-arterialization-for-the-treatment-of-no-option-critical-limb-ischemia
#16
Steven Kum, Yih Kai Tan, Michiel A Schreve, Roberto Ferraresi, Ramon L Varcoe, Andrej Schmidt, Dierk Scheinert, Jihad A Mustapha, Darryl M Lim, Derek Ho, Tjun Y Tang, Vlad-Adrian Alexandrescu, Pramook Mutirangura
PURPOSE: To report the initial clinical experience with percutaneous deep vein arterialization (PDVA) to treat critical limb ischemia (CLI) via the creation of an arteriovenous fistula. METHODS: Seven patients (median age 85 years; 5 women) with CLI and no traditional endovascular or surgical revascularization options (no-option CLI) were recruited in a pilot study to determine the safety of PDVA. All patients were diabetic; 4 had Rutherford category 6 ischemia...
July 1, 2017: Journal of Endovascular Therapy
https://www.readbyqxmd.com/read/28695442/fistula-first-initiative-historical-impact-on-vascular-access-practice-patterns-and-influence-on-future-vascular-access-care
#17
Timmy Lee
The vascular access is the lifeline for the hemodialysis patient. In the United States, the Fistula First Breakthrough Initiative (FFBI) has been influential in improving use of arteriovenous fistulas (AVF) in prevalent hemodialysis patients. Currently, prevalent AVF rates are near the goal of 66% set forth by the original FFBI. However, central venous catheter (CVC) rates remain very high in the United States in patients initiating hemodialysis, nearly exceeding 80%. A new direction of the of the FFBI has focused on strategies to reduce CVC use, and subsequently the FFBI has now been renamed the "Fistula First-Catheter Last Initiative"...
July 10, 2017: Cardiovascular Engineering and Technology
https://www.readbyqxmd.com/read/28693252/clinical-outcomes-of-percutaneous-radiofrequency-ablation-for-small-renal-cancer
#18
Keiichi Ito, Shigeyoshi Soga, Kenji Seguchi, Yusuke Shinchi, Ayako Masunaga, Shinsuke Tasaki, Kenji Kuroda, Akinori Sato, Junichi Asakuma, Akio Horiguchi, Hiroshi Shinmoto, Tatsumi Kaji, Tomohiko Asano
Partial nephrectomy is the treatment of choice for small renal cell carcinoma (RCC) from the perspective of cancer management and renal function. However, when patients with RCC are of advanced age, exhibit severe comorbidities, including cardiovascular and pulmonary diseases, or have hereditary RCC, ablative therapies, including radiofrequency ablation (RFA) and cryoablation are useful treatment options. In the present study, the clinical outcomes of percutaneous RFA for treating small RCC were evaluated. Between December 2005 and March 2015, 40 patients (41 renal tumors in total) underwent RFA and a total of 50 sessions of RFA were performed...
July 2017: Oncology Letters
https://www.readbyqxmd.com/read/28690870/spinal-dural-arteriovenous-fistula-a-case-series-and-review-of-imaging-findings
#19
Shandy Fox, Luke Hnenny, Uzair Ahmed, Kotoo Meguro, Michael E Kelly
INTRODUCTION: Spinal dural arteriovenous fistulae (sdAVF) are rare lesions. Patients typically present with slowly progressive myelopathy that is often mistaken for degenerative cervical or lumbar stenosis. On spinal magnetic resonance imaging (MRI), multisegmental T2 hyperintensities along with associated flow voids are pathognomonic of sdAVF. However, diagnosis can be difficult. Definitive diagnosis and localization is achieved with complete spinal angiography. Treatment options include open surgical ligation, endovascular embolization or multimodality treatment...
2017: Spinal Cord Series and Cases
https://www.readbyqxmd.com/read/28689937/multiple-spontaneous-iliac-and-femoral-arteriovenous-fistulas
#20
Masahiko Fujii, Manabu Sakurai, Kenji Mogi, Anan Nomura, Tomoki Sakata, Yoshiharu Takahara
An arteriovenous fistula in a limb involves an abnormal connection between a limb artery and vein. It can be due to trauma or iatrogenic injury. Traumatic arteriovenous fistulas can be caused by penetrating or gunshot injuries to the limb, while iatrogenic causes include catheter intervention to the groins or open surgery of the inguinal space. By contrast, the occurrence of multiple spontaneous arteriovenous fistulas is rare. We report a case of endovascular therapy for multiple spontaneous arteriovenous fistulas between the iliac artery and the vein, common femoral artery and the vein, superficial artery and the saphenous vein, and deep femoral artery and the vein...
July 6, 2017: Annals of Vascular Surgery
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