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vein wall thickness

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https://www.readbyqxmd.com/read/28441232/atriobronchial-fistula-complicated-by-septic-cerebral-air-emboli-after-pulmonary-vein-ablation
#1
David Velghe, Thomas Apers, Stefanie Devriendt, Ivo Deblier, Bart Hendriks, Rogier Nieuwendijk, Peter Rogiers
OBJECTIVE: To describe a case of an infected atriobronchial fistula as a late complication after pulmonary vein ablation, leading to septic air emboli and requiring urgent cardiac surgery. DATA SOURCES: Clinical observation. STUDY SELECTION: Case report. DATA EXTRACTION: Relevant clinical information. PubMed was searched for relevant literature. DATA SYNTHESIS: Given its high success and low complication rate, pulmonary vein isolation is expected to be increasingly performed worldwide...
April 22, 2017: Critical Care Medicine
https://www.readbyqxmd.com/read/28365703/in-vivo-imaging-of-the-cerebral-endothelial-glycocalyx-in-mice
#2
Jin-Hui Yoon, Eek-Sung Lee, Yong Jeong
BACKGROUND/AIMS: Endothelial glycocalyx refers to the proteoglycan or glycoprotein layer of vessel walls and has critical physiological functions. Cerebral glycocalyx may have additional functions considering the blood-brain barrier and other features. However, the assessment of it has only been performed ex vivo, which includes processes presumably damaging the glycocalyx layer. Here we visualize and characterize the cerebral endothelial glycocalyx in vivo. METHODS: We visualized and quantified the cerebral endothelial glycocalyx in vivo under a 2-photon microscope by tagging glycocalyx and vessel lumen with wheat germ agglutinin lectin and dextran, respectively...
April 1, 2017: Journal of Vascular Research
https://www.readbyqxmd.com/read/28357555/morphological-study-and-relations-of-the-fascia-vasto-adductoria
#3
Eman Elazab Beheiry Elazab
The precise description of the fascia vasto-adductoria (FVA) has become an issue of great surgical and clinical importance. Neurovascular entrapment within the adductor canal (AC) may simulate many clinical conditions for cases presented with medial knee or leg pain and ischemic manifestations of the leg. The aim of the present work is to describe the morphological features of the FVA and to elucidate its neurovascular relations. Forty thigh specimens, pertaining to 15 embalmed and five fresh adult human cadavers, were dissected in pursuit of this aim...
March 29, 2017: Surgical and Radiologic Anatomy: SRA
https://www.readbyqxmd.com/read/28325446/segmentation-of-elastic-fibres-in-images-of-vessel-wall-sections-stained-with-weigert-s-resorcin-fuchsin
#4
Pablo Hernández-Morera, Carlos M Travieso-González, Irene Castaño-González, Blanca Mompeó-Corredera, Francisco Ortega-Santana
BACKGROUND AND OBJECTIVE: The elastic fibres are an essential component of the extracellular matrix in blood vessel walls that allows a long-range of deformability and passive recoil without energy input. The quantitative determination of elastic fibres will provide information on the state of the vascular wall and to determine the role and behaviour of this key structural element in different physiological and pathological vascular processes. METHODS: We present a segmentation method to identify and quantify elastic fibres based on a local threshold technique and some morphological characteristics measured on the segmented objects that facilitate the discrimination between elastic fibres and other image components...
April 2017: Computer Methods and Programs in Biomedicine
https://www.readbyqxmd.com/read/28322592/intravascular-pulmonary-venous-ultrasound-imaging-for-catheter-ablation-of-atrial-fibrillation
#5
Gabriel Cismaru, Serban Schiau, Lucian Muresan, Radu Rosu, Mihai Puiu, Gabriel Gusetu, Dana Pop, Dumitru Zdrenghea
Atrial fibrillation is the most common cardiac arrhythmia. The development of electroanatomical mapping is an increase demand for advanced intracardiac imaging techniques of the left atrium and pulmonary veins. IVUS can demonstrate quantitative changes like lumen and wall thickness as well as qualitative changes of the pulmonary wall. IVUS could also provide relevant real time imaging of the atrial and pulmonary venous wall during catheter ablation. Areas covered: The Medline and Embase databases were searched for preclinical and clinical studies of IVUS in patients with ablation of atrial fibrillation or left atrial arrhythmias...
April 2017: Expert Review of Medical Devices
https://www.readbyqxmd.com/read/28297834/-effect-of-inhibiting-perivascular-adhesion-on-intimal-hyperplasia-of-the-vein-grafts-in-rabbits
#6
M K Guo, J X Zhu, C M Han, T Bao, D Yang, P Yu, Y F Duan, F L Fan, H G Zhang, H J Tian
Objective: To investigate the effect of preventing perivascular adhesion with topical application of sodium hyaluronate on intimal hyperplasia of the vein grafts in rabbits. Methods: Twenty-four male New Zealand white rabbits, aged 5 months, were randomly divided into 2 groups: Group A and B (n=12 rabbits per group). Artery defect model was established by cutting about 1 cm artery from the middle part of the dissociated left common carotid artery. A section about 3 cm was cut from the right external jugular vein, and the harvested vein was inverted and end-to-end anastomosed to the artery defect...
March 7, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28293509/free-flap-salvage-after-recurrent-venous-thrombosis-by-means-of-large-scale-treatment-with-medical-leeches
#7
Kensuke Tashiro, Masahide Fujiki, Masaki Arikawa, Yu Kagaya, Shimpei Miyamoto
An anterolateral thigh flap was salvaged using 110 medical leeches in the absence of an available vein for reanastomosis. After surgical construction of the flap for full-thickness thoracic wall reconstruction, the patient developed complete venous occlusion. Specifically, the anastomotic vein developed complete occlusion, and the internal jugular vein had a thrombus. In addition, because the lung was posterior to the flap, the angiogenic area of the flap was very small. When the medical leeches were first applied, the flap showed prominent venous congestion...
December 2016: Plastic and Reconstructive Surgery. Global Open
https://www.readbyqxmd.com/read/28287603/shunt-surgery-right-heart-catheterization-and-vascular-morphometry-in-a-rat-model-for-flow-induced-pulmonary-arterial-hypertension
#8
Diederik E van der Feen, Michel Weij, Annemieke Smit-van Oosten, Lysanne M Jorna, Quint A J Hagdorn, Beatrijs Bartelds, Rolf M F Berger
In this protocol, PAH is induced by combining a 60 mg/kg monocrotalin (MCT) injection with increased pulmonary blood flow through an aorto-caval shunt (MCT+Flow). The shunt is created by inserting an 18-G needle from the abdominal aorta into the adjacent caval vein. Increased pulmonary flow has been demonstrated as an essential trigger for a severe form of PAH with distinct phases of disease progression, characterized by early medial hypertrophy followed by neointimal lesions and the progressive occlusion of the small pulmonary vessels...
February 11, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28267081/the-diagnostic-value-of-hepatic-arterial-velocity-in-venoocclusive-disease-after-pediatric-hematopoietic-stem-cell-transplantation
#9
Nusabe Kaya, Fatih Erbey, Didem Atay, Arzu Akçay, Ceyhun Bozkurt, Gulyuz Ozturk
The aim of this study was to determine usefulness of measurements of maximal systolic velocity of the hepatic artery with Doppler ultrasonography in the diagnosis of venoocclusive disease (VOD) after hematopoietic stem cell transplantation. We prospectively obtained 5 sonograms per patient: pretransplantation, day +1, +7, +14, and +28 on 36 nonconsecutive children who underwent hematopoietic stem cell transplantation. We examined the hepatic artery, the portal, hepatic and splenic veins, the thickness of the gallbladder wall, the presence of ascites, and the liver and spleen size...
May 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28260190/general-anesthesia-improves-contact-force-and-reduces-gap-formation-in-pulmonary-vein-isolation-a-comparison-with-conscious-sedation
#10
Akio Chikata, Takeshi Kato, Takanori Yaegashi, Satoru Sakagami, Chieko Kato, Takahiro Saeki, Keiichi Kawai, Shin-Ichiro Takashima, Hisayoshi Murai, Soichiro Usui, Hiroshi Furusho, Shuichi Kaneko, Masayuki Takamura
Compared to conscious sedation (CS), the use of general anesthesia (GA) in pulmonary vein isolation (PVI) is associated with a lower recurrence rate of atrial fibrillation (AF). GA may improve catheter stability and mapping system accuracy compared to CS, but its influence on contact force (CF) parameters during ipsilateral PVI has not previously been investigated. The study population comprised 176 consecutive patients (107 in GA group and 69 in CS group) with AF who underwent their first PVI procedure. We retrospectively assessed CF parameters, force-time integral (FTI), FTI/wall thickness during anatomical ipsilateral PVI and long-term outcome after ablation...
March 4, 2017: Heart and Vessels
https://www.readbyqxmd.com/read/28235957/cerebral-arteriovenous-malformation-flow-is-associated-with-venous-intimal-hyperplasia
#11
Sophia F Shakur, Ahmed E Hussein, Sepideh Amin-Hanjani, Tibor Valyi-Nagy, Fady T Charbel, Ali Alaraj
BACKGROUND AND PURPOSE: The pathogenesis of venous intimal hyperplasia and venous outflow stenosis associated with cerebral arteriovenous malformation (AVM) draining veins is poorly understood. We sought to determine the relationship between maximum vein wall thickness and AVM flow. METHODS: Patients who underwent AVM surgical resection and had flow measured before treatment using quantitative magnetic resonance angiography were retrospectively reviewed. Specimens were mounted on slides and stained with elastin special stain...
February 24, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28214490/saphenous-vein-wall-thickness-in-age-and-venous-reflux-associated-remodeling-in-adults
#12
Nicos Labropoulos, Kelli Leilani Summers, Ignacio Escotto Sanchez, Joseph Raffetto
OBJECTIVE: This prospective study was designed to determine the great saphenous vein (GSV) wall thickness in age-related and venous reflux-associated remodeling. METHODS: GSV wall thickness was measured in the thigh and calf using a duplex ultrasound 17-MHz transducer. Interobserver and intraobserver variability studies were performed. Two healthy control groups, each with 10 individuals (20 limbs), were selected on the basis of age. Group 1 had a mean age of 21 years, and group 2 had a mean age of 64 years...
March 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/28120557/a-thin-left-atrial-antral-wall-around-the-pulmonary-vein-reflects-structural-remodeling-by-atrial-fibrillation-and-is-associated-with-stroke
#13
Junbeom Park, Chul Hwan Park, Jae Sun Uhm, Hui Nam Pak, Moon Hyoung Lee, Boyoung Joung
PURPOSE: Circumferential pulmonary (PV) vein isolation (CPVI) is the most important treatment strategy for atrial fibrillation (AF). While understanding left atrial wall thickness around PVs (PVWT) prior to catheter ablation is important, its clinical implications are not known. This study aimed to evaluate PVWT characteristics according to underlying disease and to identify associations between PVWT and reconnections of PV potentials (PVPs) in redo ablation. MATERIALS AND METHODS: In 28 patients who underwent redo-AF ablation, PVWT and reconnected PVPs were evaluated at 12 sites (1-12 o'clock) around each PV...
March 2017: Yonsei Medical Journal
https://www.readbyqxmd.com/read/28114851/theoretical-and-experimental-analysis-of-amplitude-control-ablation-and-bipolar-ablation-in-creating-linear-lesion-and-discrete-lesions-for-treating-atrial-fibrillation
#14
Shengjie Yan, Xiaomei Wu, Weiqi Wang
PURPOSE: Radiofrequency (RF) energy is often used to create a linear lesion or discrete lesions for blocking the accessory conduction pathways for treating atrial fibrillation. By using finite element analysis, we study the ablation effect of amplitude control ablation mode (AcM) and bipolar ablation mode (BiM) in creating a linear lesion and discrete lesions in a 5-mm-thick atrial wall; particularly, the characteristic of lesion shape has been investigated in amplitude control ablation...
January 23, 2017: International Journal of Hyperthermia
https://www.readbyqxmd.com/read/28094663/high-pressure-low-flow-remodeling-of-the-rat-saphenous-vein-wall
#15
Judit R Hetthéssy, Anna-Mária Tőkés, Sándor Kérész, Petra Balla, Gabriella Dörnyei, Emil Monos, György L Nádasy
Objective To better understand factors that may play a role in the development of varicosities. Methods We induced combined flow-pressure disturbance in the saphenous system of the rat by performing chronic partial clipping of the main branch. Biomechanical and quantitative histological testing was undertaken. Results A rich microvenous network developed. Bloodflow decreased to 0.65 ± 0.18 µl/s (control side, 3.5 ± 1.4 µl/s) and pressure elevated to 6.8 ± 0.7 mmHg (control side, 2.3 ± 0...
January 1, 2017: Phlebology
https://www.readbyqxmd.com/read/28040761/penetration-of-bronchial-wall-by-knot-of-absorbable-monofilament-suture
#16
Tomoyuki Nakano, Shunsuke Endo, Hideki Negishi, Shinichi Yamamoto
A 75-year-old man underwent thoracoscopic left upper lobectomy for primary lung cancer. Additional ligature plication to the left superior pulmonary vein with absorbable monofilament suture was performed after stapling with an endostapler. Postoperative bronchoscopy revealed penetration of the monofilament thread edge eviscerating across the wall of the left main bronchus. The edge was spontaneously absorbed with no adverse events. Penetration of a thick monofilament thread edge into mediastinal organs should be considered when the thread is located in the mediastinum...
December 31, 2016: Interactive Cardiovascular and Thoracic Surgery
https://www.readbyqxmd.com/read/28012458/impact-of-early-and-late-onset-preeclampsia-on-features-of-placental-and-newborn-vascular-health
#17
Emilie M Herzog, Alex J Eggink, Anniek Reijnierse, Martina A M Kerkhof, Ronald R de Krijger, Anton J M Roks, Irwin K M Reiss, Alex L Nigg, Paul H C Eilers, Eric A P Steegers, Régine P M Steegers-Theunissen
INTRODUCTION: Offspring exposed to preeclampsia (PE) show an increased risk of cardiovascular disease in adulthood. We hypothesize that this is mediated by a disturbed vascular development of the placenta, umbilical cord and fetus. Therefore, we investigated associations between early-onset PE (EOPE), late-onset PE (LOPE) and features of placental and newborn vascular health. METHODS: We performed a nested case-control study in The Rotterdam Periconceptional Cohort, including 30 PE pregnancies (15 EOPE, 15 LOPE) and 218 control pregnancies (164 uncomplicated controls, 54 complicated controls including 28 fetal growth restriction, 26 preterm birth) and assessed macroscopic and histomorphometric outcomes of the placenta and umbilical cord...
January 2017: Placenta
https://www.readbyqxmd.com/read/27752921/full-mimicking-of-coronary-hemodynamics-for-ex-vivo-stimulation-of-human-saphenous-veins
#18
Marco Piola, Matthijs Ruiter, Riccardo Vismara, Valeria Mastrullo, Marco Agrifoglio, Marco Zanobini, Maurizio Pesce, Monica Soncini, Gianfranco Beniamino Fiore
After coronary artery bypass grafting, structural modifications of the saphenous vein wall lead to lumen narrowing in response to the altered hemodynamic conditions. Here we present the design of a novel ex vivo culture system conceived for mimicking central coronary artery hemodynamics, and we report the results of biomechanical stimulation experiments using human saphenous vein samples. The novel pulsatile system used an aortic-like pressure for forcing a time-dependent coronary-like resistance to obtain the corresponding coronary-like flow rate...
April 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/27639001/alterations-in-macrophage-phenotypes-in-experimental-venous-thrombosis
#19
Katherine A Gallagher, Andrea T Obi, Megan A Elfline, Emily Hogikyan, Catherine E Luke, Samuel Henke, Dawn Coleman, Peter K Henke
OBJECTIVE: Macrophages are involved in venous thrombus (VT) resolution and vein wall remodeling. This study was undertaken to identify variations in macrophage phenotypes in thrombi and vein wall in multiple models of VT to clarify the natural history of macrophage polarization in clearance of VT. We also sought to demonstrate the feasibility of macrophage phenotyping in human VT. METHODS: Established murine models of VT were used to mimic the clinical spectrum of human VT (stasis and nonstasis models)...
October 2016: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/27622956/the-effects-of-iontophoretic-injections-of-salvia-miltiorrhiza-on-the-maturation-of-the-arteriovenous-fistula-a-randomized-controlled-trial
#20
RANDOMIZED CONTROLLED TRIAL
Wang Rongrong, Deng Li, Zhang Guangqing, Chen Xiaoyin, Bao Kun
Context • For patients undergoing hemodialysis, the native arteriovenous fistula (AVF) is the primary approach to vascular access (VA). VA failure is the main cause of morbidity and mortality in hemodialysis patients. It has been reported in recent studies that the primary failure rate can be as high as 50%. Objective • The study investigated the effects of iontophoretic administration of Salvia miltiorrhiza (SM) on the maturation of the AVF. Design • The study was a randomized, controlled trial. Setting • The study occurred in Guangdong Provincial Hospital of Traditional Chinese Medicine (Guangzhou, China)...
September 2016: Alternative Therapies in Health and Medicine
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