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Arteriovenous fistula

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https://www.readbyqxmd.com/read/28430541/a-comprehensive-approach-to-hepatic-vascular-disease
#1
Khaled M Elsayes, Akram M Shaaban, Sarah M Rothan, Sanaz Javadi, Beatrice L Madrazo, Rosa P Castillo, Victor J Casillas, Christine O Menias
The liver has a complex vascular supply, which involves the inflow of oxygenated blood through the hepatic artery (systemic circulation) and deoxygenated blood through the portal vein (portal circulation), as well as the outflow of deoxygenated blood through the hepatic veins to the inferior vena cava. A spectrum of vascular variants can involve the liver. Some of these variants may result in areas of enhancement that can mimic more serious pathologic conditions. In this article, the authors discuss a spectrum of variants and pathologic conditions that may involve the liver vasculature...
April 21, 2017: Radiographics: a Review Publication of the Radiological Society of North America, Inc
https://www.readbyqxmd.com/read/28430315/adding-access-blood-flow-surveillance-reduces-thrombosis-and-improves-arteriovenous-fistula-patency-a-randomized-controlled-trial
#2
Inés Aragoncillo, Soraya Abad, Silvia Caldés, Yésika Amézquita, Almudena Vega, Antonio Cirugeda, Cristina Moratilla, José Ibeas, Ramón Roca-Tey, Cristina Fernández, Nicolás Macías, Borja Quiroga, Ana Blanco, Maite Villaverde, Caridad Ruiz, Belén Martín, Asunción M Ruiz, Jara Ampuero, Fernando de Alvaro, Juan M López-Gómez
PURPOSE: Stenosis is the main cause of arteriovenous fistula (AVF) failure. It is still unclear whether surveillance based on vascular access blood flow (QA) enhances AVF function and longevity. METHODS: We conducted a three-year follow-up randomized, controlled, multicenter, open-label trial to compare QA-based surveillance and pre-emptive repair of subclinical stenosis with standard monitoring/surveillance techniques in prevalent mature AVFs. AVFs were randomized to either the control group (surveillance based on classic alarm criteria; n = 104) or to the QA group (QA measured quarterly using Doppler ultrasound [M-Turbo®] and ultrasound dilution [Transonic®] added to classic surveillance; n = 103)...
April 20, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28430314/transulnar-approach-as-an-alternative-to-transradial-approach-in-non-coronary-intervention-safety-feasibility-and-technical-factors
#3
Adam Zybulewski, Martin Edwards, Edward Kim, Francis S Nowakowski, Rahul Patel, Nora Tabori, Robert Lookstein, Aaron Fischman
PURPOSE: Transulnar access (TUA) has been shown to be an effective alternative to transradial access (TRA) for coronary intervention. This study evaluates the safety and efficacy of TUA in patients undergoing visceral interventions in the setting of contraindication to TRA. MATERIALS AND METHODS: Patients who underwent visceral interventions via ulnar approach were included in the study. Outcome variables include technical success, access site and bleeding complications...
April 13, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28430311/effect-of-hemodialysis-access-blood-flow-on-cardiac-events-after-coronary-artery-bypass-grafting-using-an-internal-thoracic-artery
#4
Leonid Feldman, Ilia Beberashvili, Ahmad Abu Tair, Shai Efrati, Oleg Gorelik, Walter G Wasser, Eitan Heldenberg, Igor Rabin
BACKGROUND: The possibility of coronary steal through an arteriovenous fistula (AVF) in hemodialysis (HD) patients with coronary artery bypass grafts (CABGs) using an ipsilateral internal thoracic artery (ITA) has been suggested. In order to define the significance of such a possibility, we analyzed cardiac events and mortality risk in patients in relation to AVF flow. METHODS: A retrospective cohort study was performed on prevalent HD patients from a single center...
April 14, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28430307/the-incidence-and-risk-factors-of-coronary-steal-after-ipsilateral-avf-in-patients-with-a-coronary-artery-bypass-graft
#5
Sanghyun Ahn, Ahram Han, Song-Yi Kim, Chanjoong Choi, Sang-Il Min, Jongwon Ha, Ho Young Hwang, Ki-Bong Kim, Seung-Kee Min
OBJECTIVE: Ipsilateral arteriovenous fistula (AVF) may cause symptoms of coronary steal in patients who had undergone coronary artery bypass graft (CABG) using internal thoracic artery. The purpose of this study was to evaluate the adverse effects of ipsilateral AVF to CABG, including the incidence of coronary steal, and to analyze the risk factors for coronary steal. METHODS: Between 2000 and 2013, a total of 25 patients undergoing hemodialysis via upper extremity AVF, ipsilateral to the preexisting CABG, were reviewed retrospectively...
April 14, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28430306/endovascular-covered-stenting-to-treat-an-arteriovenous-graft-to-native-vein-fistula-caused-by-dialysis-needle-cannulation
#6
Stephanie Y S Yong, Ee Jean Lim, Chieh Suai Tan, Jack K Chng
No abstract text is available yet for this article.
April 18, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28427979/a-new-type-of-spinal-epidural-arteriovenous-fistulas-causes-spinal-epidural-hemorrhage-an-analysis-of-five-cases-and-natural-history-consideration
#7
Jia-Xing Yu, Tao Hong, Yong-Jie Ma, Feng Ling, Hong-Qi Zhang
BACKGROUND: Spinal epidural arteriovenous fistulas (SEDAVFs) are peculiar and poorly understood lesions with a poorly understood natural history. They are usually subclassified into two types according to their drainage components. This study aimed to describe a new type of SEDAVFs that is featured with a unique drainage pattern and present our natural history hypothesis of SEDAVFs. METHODS: Five SEDAVF cases of the new type were retrospectively reviewed from a high case-volume spinal vascular malformation database...
April 17, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28427974/factors-predicting-spontaneous-thrombosis-of-aggressive-cranial-dural-arteriovenous-fistulas
#8
Santhosh Kumar Kannath, Jayadevan Enakshy Rajan, Amirtendu Mukherjee, Sankara Sarma P
BACKGROUND: Dural arteriovenous fistula (DAVF) with cortical venous drainage (CVD) are known to be aggressive in clinical course and are usually managed promptly. Spontaneous resolution of DAVF is a rare phenomenon and usually occurs in benign type of fistulas. Spontaneous thrombosis of aggressive DAVF is an extremely rare occurrence. The present study aims to identify the incidence and factors determining spontaneous resolution of aggressive DAVF. METHODS: All the patients presenting to our institution with suspected DAVF during the study period (July 2013 - December 2015) were prospectively enrolled into a database...
April 17, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28427126/-patency-rate-of-autogenous-arteriovenous-fistula-after-repairment-in-the-patients-with-late-fistula-dysfunction-faliure
#9
M Zhou, F P Lu
Objective: To invesitigate 3-year patency rate of autogenous arteriovenous fistula(AVF)in the patients with late fistula dysfunction/failure. Methods: The prospective study was carried out in the First Hospital of Tsinghua University from March 2012 to March 2013. A total of 136 maintenance hemodialysis patients with late AVF dysfunction/faliure who received AVF repairment were enrolled in the study. All the patients were divided into three groups according to surgical procedures: venous neointimal hyperplasia (VNH) stripping group (group A), non-VNH stripping group (group B) and creation of a new AVF group (group C)...
April 18, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28424037/aortic-customized-stent-graft-treatment-of-postnephrectomy-renal-pedicle-arteriovenous-fistula
#10
Francisco Manresa-Manresa, José María Sánchez-Rodríguez, Verónica Nacarino-Mejías, Javier Peiró de Las Heras, Juan Francisco Ponce-González
A postnephrectomy renal acquired arteriovenous fistula (AVF) is a rare clinical entity that may cause high-output heart failure. Most of the cases are identified time along after surgery. We present a case of a postnephrectomy renal AVF treated with aortic customized stent-graft.
May 2017: Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28424011/endovascular-treatment-evolution-for-pure-intraorbital-arteriovenous-fistula-three-case-reports-and-literature-review
#11
Xianli Lv, Wei Li, Aihua Liu, Ming Lv, Chuhan Jiang
Background and importance Intraorbital arteriovenous fistulas (IOAVFs) are rare and cause eye redness, exophthalmos, blurry vision and bruit. Whereas in the past they were treated conservatively, surgically or transarterially, recent developments in transvenous embolization have improved their treatment. In this paper the authors report three cases of IOAVFs treated endovascularly and review the evolution of treatment options. Methods Three cases of purely IOAVF enrolled in our center were reported and a PubMed literature search was performed using "pure intraorbital arteriovenous fistula" and "arteriovenous fistula of the optic nerve sheath...
April 2017: Neuroradiology Journal
https://www.readbyqxmd.com/read/28423125/coronary-arteriovenous-fistulas-in-adult-patients-surgical-management-and-outcomes
#12
Sebnem Albeyoglu, Mustafa Aldag, Ufuk Ciloglu, Murat Sargin, Tugba Kemaloglu Oz, Hakan Kutlu, Sabri Dagsali
Objective: The aim of this study was to describe the demographic, clinical and anatomic characteristics of coronary arteriovenous fistulas in adult patients who underwent open cardiac surgery and to review surgical management and outcomes. Methods: Twenty-one adult patients (12 female, 9 male; mean age: 56.1±7.9 years) who underwent surgical treatment for coronary arteriovenous fistulas were retrospectively included in this study. Coronary angiography, chest X-ray, electrocardiography and transthoracic echocardiography were preoperatively performed in all patients...
January 2017: Brazilian Journal of Cardiovascular Surgery
https://www.readbyqxmd.com/read/28420654/changes-in-the-profile-of-endovascular-procedures-performed-in-freestanding-dialysis-access-centers-over-15-years
#13
Gerald A Beathard, Aris Urbanes, Terry Litchfield
BACKGROUND AND OBJECTIVES: Marked changes occurred in the vascular access profile of patients receiving hemodialysis in the United States over the 15-year period of 2001-2015. This study was undertaken to evaluate how these changes have affected dialysis access maintenance and salvage procedures performed in freestanding dialysis access centers and to examine the effectiveness, efficiency, and safety of these procedures in this setting. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: Data were collected from freestanding, dedicated dialysis access centers operating under a common system of management...
April 18, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28415162/value-of-doppler-evaluation-of-physically-abnormal-fistula-hemodynamic-guidelines-and-access-outcomes
#14
Seong Cho, Yu-Ji Lee, Sung-Rok Kim
Background/Aims: The strategy of access care at out center involves the use of ultrasound (USG) in case of physical examination (PE) abnormality. USG determines the need of angiography. This study investigated the possible association between the need for percutaneous transluminal angioplasty (PTA) and hemodynamic parameters of USG. The study also assessed the effects of this monitoring strategy on outcomes in comparison with a historical control. Methods: A retrospective study of the medical records of 127 patients (65 PTA, 62 non-PTA) was conducted...
April 18, 2017: Korean Journal of Internal Medicine
https://www.readbyqxmd.com/read/28414573/phosphatidylserine-translocation-after-radiosurgery-in-an-animal-model-of-arteriovenous-malformation
#15
Newsha Raoufi Rad, Lucinda S McRobb, Zhenjun Zhao, Vivienne S Lee, Nirav J Patel, Anas Sarwar Qureshi, Michael Grace, Joshua J McHattan, Jude V Amal Raj, Hong Duong, Saleh R Kashba, Marcus A Stoodley
Phosphatidylserine (PS) is asymmetrically distributed across the plasma membrane, located predominantly on the inner leaflet in healthy cells. Translocation of PS to the outer leaflet makes it available as a target for biological therapies. We examined PS translocation after radiosurgery in an animal model of brain arteriovenous malformation (AVM). An arteriovenous fistula was created by end-to-side anastomosis of the left external jugular vein to the common carotid artery in 6-week-old, male Sprague Dawley rats...
April 17, 2017: Radiation Research
https://www.readbyqxmd.com/read/28410648/risk-prediction-models-in-ckd
#16
REVIEW
Blake Lerner, Sean Desrochers, Navdeep Tangri
Chronic kidney disease (CKD) currently affects 20 million Americans and is associated with increased morbidity and mortality. Resource-efficient and appropriate treatment of CKD benefits the patient and provides improved resource allocation for the health care system. Prediction models can be useful in efficiently allocating resources, and currently are being used at the bedside for several important clinical decisions. There is a paucity of prediction models in use in nephrology, but one such model, the Kidney Failure Risk Equation, uses routinely collected laboratory values and can inform clinical decisions related to the following: (1) triage of nephrology referrals, (2) evaluating the need for more intensive interdisciplinary clinic care, (3) determining the timing of modality education, and (4) dialysis access planning...
March 2017: Seminars in Nephrology
https://www.readbyqxmd.com/read/28409733/endovascular-management-of-acute-epidural-hematomas-clinical-experience-with-80-cases
#17
Carlos Michel A Peres, Jose Guilherme M P Caldas, Paulo Puglia, Almir F de Andrade, Igor A F da Silva, Manoel J Teixeira, Eberval G Figueiredo
OBJECTIVE Small acute epidural hematomas (EDHs) treated conservatively carry a nonmeasurable risk of late enlargement due to middle meningeal artery (MMA) lesions. Patients with EDHs need to stay hospitalized for several days, with neurological supervision and repeated CT scans. In this study, the authors analyzed the safety and efficacy of the embolization of the involved MMA and associated lesions. METHODS The study group consisted of 80 consecutive patients harboring small- to medium-sized EDHs treated by MMA embolization between January 2010 and December 2014...
April 14, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28408632/4d-dsa-for-dynamic-visualization-of-cerebral-vasculature-a-single-center-experience-in-26-cases
#18
S Lang, P Gölitz, T Struffert, J Rösch, K Rössler, M Kowarschik, C Strother, A Doerfler
BACKGROUND AND PURPOSE: 4D DSA allows acquisition of time-resolved 3D reconstructions of cerebral vessels by using C-arm conebeam CT systems. The aim of our study was to evaluate this new method by qualitative and quantitative means. MATERIALS AND METHODS: 2D and 4D DSA datasets were acquired in patients presenting with AVMs, dural arteriovenous fistulas, and cerebral aneurysms. 4D DSA was compared with 2D DSA in a consensus reading of qualitative and quantitative parameters of AVMs (eg, location, feeder, associated aneurysms, nidus size, drainage, Martin-Spetzler Score), dural arteriovenous fistulas (eg, fistulous point, main feeder, diameter of the main feeder, drainage), and cerebral aneurysms (location, neck configuration, aneurysmal size)...
April 13, 2017: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/28408264/single-session-hematoma-removal-and-transcranial-coil-embolization-for-a-cavernous-sinus-dural-arteriovenous-fistula-a-technical-case-report
#19
Yosuke Akamatsu, Kenichi Sato, Hidenori Endo, Yasushi Matsumoto, Teiji Tominaga
BACKGROUND: Patients with cavernous sinus dural arteriovenous fistulas (CS dAVFs) with cortical venous varix are indicated for aggressive treatment because of the associated risk for intracranial hemorrhage. CASE DESCRIPTION: We present a case of surgical transvenous embolization in an 84-year-old woman with CS dAVF who presented with massive intracerebral hematoma. Cerebral angiograms revealed the dural AVF drained only into the superficial middle cerebral vein...
April 10, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28405771/sacral-epidural-arteriovenous-fistulas-imitators-of-spinal-dural-arteriovenous-fistulas-with-different-pathologic-anatomy-report-of-three-cases-and-review-of-the-literature
#20
Jan-Karl Burkhardt, Michael M Safaee, Aaron J Clark, Michael T Lawton
BACKGROUND: Sacral epidural arteriovenous fistulas (eAVFs) are rare and often misdiagnosed because of the incongruence between the thoracic level of clinical deficits and the sacral location of the offending pathology. Failure to diagnose this lesion delays treatment, resulting in prolonged venous hypertension in the cord, progressive neurological deterioration, and decreased chances of recovery. METHODS: A single-institution case series and the published literature were reviewed...
April 12, 2017: Acta Neurochirurgica
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