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Central venous stenosis

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https://www.readbyqxmd.com/read/29241989/similar-degree-of-intimal-hyperplasia-in-surgically-detected-stenotic-and-nonstenotic-arteriovenous-fistula-segments-a-preliminary-report
#1
Juan C Duque, Marwan Tabbara, Laisel Martinez, Angela Paez, Guillermo Selman, Loay H Salman, Omaida C Velazquez, Roberto I Vazquez-Padron
BACKGROUND: Intimal hyperplasia has been historically associated with improper venous remodeling and stenosis after creation of an arteriovenous fistula. Recently, however, we showed that intimal hyperplasia by itself does not explain the failure of maturation of 2-stage arteriovenous fistulas. We seek to evaluate whether intimal hyperplasia plays a role in the development of focal stenosis of an arteriovenous fistula. METHODS: This study compares intimal hyperplasia lesions in stenotic and nearby nonstenotic segments collected from the same arteriovenous fistula...
December 11, 2017: Surgery
https://www.readbyqxmd.com/read/29217877/central-venous-stenosis-what-should-a-nephrologist-know
#2
H J Mehta
No abstract text is available yet for this article.
November 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/29201488/left-brachiocephalic-vein-stenosis-due-to-the-insertion-of-a-temporal-right-subclavian-hemodialysis-catheter
#3
Eleni I Skandalou, Fani D Apostolidou-Kiouti, Ilias D Minasidis, Ioannis K Skandalos
Central vein stenosis/occlusion is a common well-described sequel to the placement of hemodialysis catheters in the central venous system. The precise mechanisms by which central vein stenosis occurs are not well known. Current concepts in central vein stenosis pathophysiology focus on the response to vessel injury model, emphasizing the process of trauma. A case of left brachiocephalic vein stenosis due to the insertion and function of a temporary right subclavian hemodialysis catheter is presented. The purpose of the manuscript is to emphasize that, with the introduction of a temporary subclavian hemodialysis catheter via the right subclavian vein apart from causing concurrent stenosis/infarction of the right subclavian and right brachiocephalic vein, it is also possible to cause stenosis of the left brachiocephalic vein (close to its contribution to the superior vena cava) although the catheter tip is placed in the correct anatomical position in the superior vena cava...
2017: Case Reports in Vascular Medicine
https://www.readbyqxmd.com/read/29192720/resolution-of-reactive-angioendotheliomatosis-in-an-arteriovenous-fistula-with-innominate-vein-angioplasty
#4
Voranaddha Vacharathit, Steven D Billings, Lee Kirksey
INTRODUCTION: Arteriovenous fistulae (AVF)-associated reactive angioendotheliomatosis (RAE) is a very rare entity (three previously reported cases in the literature) that can manifest as extremity wounds. RAE's etiopathology is unknown. CASE DESCRIPTION: We report a case of severe limb-threatening upper extremity wound with pathology-proven RAE. This lesion was previously refractory to standard wound care. There was no evidence of limb ischemia or steal syndrome, previously deemed to be the underlying cause of AVF-associated RAE in other reports...
November 25, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/29124006/selective-pulmonary-artery-occlusion-to-treat-hemoptysis-associated-with-pulmonary-venous-obstruction
#5
Melissa S W Yamauchi, Mary Hunt Martin, Harlan R Muntz, Ronald W Day
Hemoptysis may occur in patients with pulmonary venous obstruction and prominent decompressing vessels in the airways adjacent to the affected pulmonary veins. The options for treatment of hemoptysis are limited, particularly when efforts to alleviate pulmonary venous obstruction have failed. Here we describe a patient with hemoptysis associated with stenosis of the central left upper pulmonary vein and occlusion of the central left lower pulmonary vein. The left upper pulmonary vein was dilated with balloon catheters and a vascular plug was placed in the left lower pulmonary artery...
2017: Respiratory Medicine Case Reports
https://www.readbyqxmd.com/read/29084002/central-arteriovenous-anastomosis-to-treat-resistant-hypertension
#6
Vikas Kapil, Paul A Sobotka, Mel D Lobo, Roland E Schmieder
PURPOSE OF REVIEW: Novel, interventional treatments have emerged in the last decade for the treatment of resistant hypertension. This review focuses on a unique device that creates a fixed calibre, central iliac arteriovenous anastomosis that is significantly different in haemodynamic and safety profile from traditional haemodialysis fistulae. The background, physiology, and clinical data to date will be presented. RECENT FINDINGS: The single, randomized, controlled clinical trial using the ROX coupler in patients with resistant hypertension demonstrated substantial reductions in both office and ambulatory blood pressure to 12-month postimplantation...
October 27, 2017: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/29079071/occult-spinal-cord-injury-after-blunt-force-trauma-in-a-patient-with-achondroplasia-a-case-report-and-review-of-trauma-management-strategy
#7
Martin Huecker, Zach Harris, Eric Yazel
BACKGROUND: Achondroplastic dwarfism is associated with anatomic abnormalities that can predispose to occult injury and challenges in trauma management. Airway anatomy is problematic due to macrocephaly, midface hypoplasia, and a narrow nasopharynx. Manipulation of the neck is very dangerous due to the high likelihood of preexisting cervicomedullary stenosis. Restrictive lung disease and obstructive sleep apnea may complicate respiratory status. Peripheral and central venous access can be difficult to obtain...
October 2017: Journal of Emergency Medicine
https://www.readbyqxmd.com/read/29062615/venous-stent-migration-into-right-ventricle
#8
Menfil Orellana-Barrios, Nachiket Patel, Aliakbar Arvandi, Ralph Paone, Dixon Santana
Venous stents (VS) are used to treat central and peripheral stenoses. Stent embolization into a cardiac chamber is a rare, yet serious complication. We present a case of a 61-year-old man with a recently stented arteriovenous graft venous stenosis who developed VS migration into the right ventricle, associated with S. aureus bacteremia.
August 19, 2017: Curēus
https://www.readbyqxmd.com/read/29061728/central-iliac-arteriovenous-anastomosis-for-uncontrolled-hypertension-one-year-results-from-the-rox-control-htn-trial
#9
RANDOMIZED CONTROLLED TRIAL
Melvin D Lobo, Christian Ott, Paul A Sobotka, Manish Saxena, Alice Stanton, John R Cockcroft, Neil Sulke, Eamon Dolan, Markus van der Giet, Joachim Hoyer, Stephen S Furniss, John P Foran, Adam Witkowski, Andrzej Januszewicz, Danny Schoors, Konstantinos Tsioufis, Benno J Rensing, Benjamin Scott, G André Ng, Roland E Schmieder
Creation of a central iliac arteriovenous anastomosis using a novel nitinol coupler device results in an immediate, significant reduction of blood pressure (BP). We present efficacy and safety findings at 12 months post-coupler insertion. This open-label, multicenter, prospective, randomized trial enrolled patients with a baseline office systolic BP ≥140 mm Hg and average daytime ambulatory BP ≥135/85 mm Hg. Subjects were randomly allocated to coupler implantation and continuing previous pharmacotherapy or to maintain previous treatment alone...
December 2017: Hypertension
https://www.readbyqxmd.com/read/29037360/factors-influencing-peripheral-venous-pressure-in-an-experimental-model
#10
Seshadri Raju, William Crim, William Buck
BACKGROUND: Peripheral venous hypertension and microvascular injury have merged as central features of chronic venous disease. Peripheral venous pressure in the lower limb is controlled by central and peripheral mechanisms. In the current manuscript, we examine the role of peripheral factors, particularly conduit capacitance compliance, focal stenosis, and arterial inflow into the calf. METHODS: An experimental venous model using Penrose tubing as a venous analogue was used where the aforementioned parameters could be manipulated...
November 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28857418/an-unusual-case-of-an-irretrievable-hemodialysis-catheter-in-a-patient-with-end-stage-renal-disease
#11
Mehrdad Ghahremani-Ghajar, Anna Jin, Peyman Borghei, Joline L T Chen
Hemodialysis catheters are associated with higher risks of complications compared to arteriovenous fistulas and grafts. Some common complications of dialysis catheters include infection, thrombus formation, central venous stenosis, and mechanical dysfunction. Rarely, catheters can become firmly adhered to a vessel wall. Catheter adhesion is a serious complication that can impact the delivery of safe and effective dialysis to affected patients. Adherent catheters commonly present insidiously with no overt diagnostic signs and symptoms or antecedent catheter malfunction...
August 30, 2017: Hemodialysis International
https://www.readbyqxmd.com/read/28852577/sequential-venous-percutaneous-transluminal-angioplasty-and-balloon-dilatation-of-the-interatrial-septum-during-percutaneous-edge-to-edge-mitral-valve-repair
#12
Rezo Jorbenadze, Johannes Patzelt, Meinrad Gawaz, Peter Seizer, Harald F Langer
Percutaneous edge-to-edge mitral valve repair (PMVR) is widely used for selected, high-risk patients with severe mitral valve regurgitation (MR). This report describes a case of 81-year-old woman presenting with severe and highly symptomatic mitral valve regurgitation (MR) caused by a flail of the posterior mitral valve leaflet (PML). PMVR turned out to be challenging in this patient because of a stenosis and tortuosity of both iliac veins as well as sclerosis of the interatrial septum, precluding the vascular and left atrial access by standard methods, respectively...
2017: Case Reports in Cardiology
https://www.readbyqxmd.com/read/28827013/unmasking-of-previously-asymptomatic-central-venous-stenosis-following-percutaneous-transluminal-angioplasty-of-hemodialysis-access
#13
Jarrod E Ehrie, Therese E Sammarco, Jesse L Chittams, Scott O Trerotola
PURPOSE: To determine the frequency of new-onset symptoms of central venous stenosis (CVS) after percutaneous transluminal angioplasty (PTA) of a hemodialysis access-related stenosis in patients with previously asymptomatic CVS and to identify risk factors for this phenomenon. MATERIALS AND METHODS: Retrospective review was performed of patients treated with PTA for an access-related stenosis (excluding central vein interventions) between 2001 and 2016 who returned within 3 months with symptoms of CVS (ie, "unmasking"): 39 patients met these criteria...
October 2017: Journal of Vascular and Interventional Radiology: JVIR
https://www.readbyqxmd.com/read/28818219/contemporary-outcomes-after-venography-guided-treatment-of-patients-with-may-thurner-syndrome
#14
Johnathon C Rollo, Steven M Farley, Adam Z Oskowitz, Karen Woo, Brian G DeRubertis
OBJECTIVE: Patients with May-Thurner syndrome (MTS) present with a spectrum of findings ranging from mild left leg edema to extensive iliofemoral deep venous thrombosis (DVT). Whereas asymptomatic left common iliac vein (LCIV) compression can be seen in a high proportion of normal individuals on axial imaging, the percentage of these persons with symptomatic compression is small, and debate exists about the optimal clinical and diagnostic criteria to treat these lesions in patients with symptomatic venous disease...
September 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28807744/primary-stenting-is-not-necessary-in-benign-central-venous-stenosis
#15
Lynsey E Rangel, Sean P Lyden, Daniel G Clair
BACKGROUND: The aim of this study is to evaluate central venous stenosis (CVS) etiologies and presentation within a vascular surgery practice. We evaluated endovascular treatment modalities and the patency rates of our interventions. METHODS: Five-year retrospective review of endovascular intervention for CVS. Patient demographics, medical comorbidities, and variables were collected including etiology, indwelling device, previous upper extremity (UE) deep venous thrombosis, long-term UE indwelling device (defined as >30 days), malignancy status, hypercoagulable disorders, history of radiation or mediastinal fibrosis or masses, and anticoagulation and/or antiplatelet therapy...
August 12, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28790281/-perioperative-management-for-prevention-of-cardiac-complications-in-general-thoracic-surgery
#16
Terumoto Koike, Masanori Tsuchida
For general thoracic surgeons, perioperative management for prevention of cardiac complications is important because patients undergoing general thoracic surgery often have risk factors for cardiac disease. Sever cardiac failure should be detected and treated prior to surgery, and coronary artery may be examined in patients with risk factors for ischemic heart disease. Pulmonary resection sometimes causes right-sided heart failure due to reducing pulmonary vascular bed. In high-risk patients for rightsided heart failure, pulmonary artery pressure monitoring by right heart catheterization should be considered in addition to blood pressure and central venous pressure monitoring, and precise fluid management is required...
July 2017: Kyobu Geka. the Japanese Journal of Thoracic Surgery
https://www.readbyqxmd.com/read/28781891/vascular-occlusions-following-ocular-surgical-procedures-a-clinical-observation-of-vascular-complications-after-ocular-surgery
#17
Charlotte Fischer, Anne Bruggemann, Annette Hager, Josep Callizo Planas, Johann Roider, Hans Hoerauf
BACKGROUND: Ocular vascular occlusions following intraocular procedures are a rare complication. We report a case series of patients with retinal vascular occlusions or anterior ischemic optic neuropathy (AION) after anterior and posterior segment surgery and demonstrate possible risk factors. METHODS: Observational case series. RESULTS: In ten patients, vascular occlusions were observed within ten weeks after intraocular surgery: branch retinal arterial occlusion (BRAO) (n = 2), central retinal artery occlusion (CRAO) (n = 2), central retinal vein occlusion (CRVO) (n = 1), branch retinal vein occlusion (BRVO) (n = 1), anterior ischemic optic neuropathy (AION) (n = 3), and combined central artery and vein occlusion (n = 1)...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28779785/symptomatic-superior-vena-cava-syndrome-in-hemodialysis-patients-mid-term-results-of-primary-stenting
#18
MULTICENTER STUDY
Mafalda Massara, Giovanni De Caridi, Antonino Alberti, Pietro Volpe, Francesco Spinelli
This clinical report details the results of endovascular treatment of symptomatic superior vena cava syndrome due to central vein stenosis or obstruction (CVSO) by stent angioplasty in patients with dialysis-dependent end-stage renal disease. A 3-year retrospective review of two institutional registries identified 25 chronic hemodialysis patients (17 men, 8 women) affected by CVSO who received endovascular treatment. The majority of the patients (n = 19) presented with symptomatic arm, breast, and facial swelling; and 6 patients presented with dialysis-access dysfunction and venous-line hypertension...
December 2016: Seminars in Vascular Surgery
https://www.readbyqxmd.com/read/28731492/factors-causing-loss-of-normal-doppler-waveform-of-the-left-internal-jugular-vein-evaluation-on-chest-computed-tomography
#19
Min Cheol Ku, Myung Gyu Song, Tae-Seok Seo, Eun Young Kang, Hwan Seok Yong, Jae Wook Lee
PURPOSE: To evaluate the presence and causes of left brachiocephalic vein (LBCV) steno-occlusive lesions in patients with loss of normal waveform in Doppler ultrasound of the left internal jugular vein (LIJV). MATERIALS AND METHODS: We performed Doppler ultrasound of both internal jugular veins in 1912 patients who received an implantable venous access port from August 2013 to January 2016. Among them, 106 patients showed loss of normal Doppler waveforms of the LIJV (56 men and 50 women; mean age, 61...
July 19, 2017: Journal of Vascular Access
https://www.readbyqxmd.com/read/28729382/recommended-clinical-trial-end-points-for-dialysis-catheters
#20
Michael Allon, Deborah J Brouwer-Maier, Kenneth Abreo, Kevin M Baskin, Kay Bregel, Deepa H Chand, Andrea M Easom, Leonard Mermel, Michele H Mokrzycki, Priti R Patel, Prabir Roy-Chaudhury, Surendra Shenoy, Rudolph P Valentini, Haimanot Wasse
Central venous catheters are used frequently in patients on hemodialysis as a bridge to a permanent vascular access. They are prone to frequent complications, including catheter-related bloodstream infection, catheter dysfunction, and central vein obstruction. There is a compelling need to develop new drugs or devices to prevent central venous catheter complications. We convened a multidisciplinary panel of experts to propose standardized definitions of catheter end points to guide the design of future clinical trials seeking approval from the Food and Drug Administration...
July 20, 2017: Clinical Journal of the American Society of Nephrology: CJASN
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