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vein wall thickness

Ping Lü, Qibin Jiao, Daisuke Shimura, Yoichiro Kusakari, Fang Liu, Susumu Minamisawa
BACKGROUND: Previous research has revealed that patent vein grafts lose their venous identity Eph-B4 but not gain arterial identity Ephrin-B2 during adaptation to the arterial circulation, and vascular identity marker, e.g., the Eph-B4 signaling is a critical determinant of venous wall thickness of vein grafts. But what is the remodeling pattern, especially the remodeling pattern of vascular identity in the venous segment of arteriovenous shunt at a late stage post-operation has not been fully explored...
March 1, 2018: Annals of Vascular Surgery
Juliana Jaramillo, Karen T Valencia-Rivero, Francisco J Cedano-Serrano, Rocío López, Néstor Sandoval, Juan C Briceño
Synthetic vascular access for hemodialysis exhibits biological and mechanical material properties mismatch with the native vessels. These limitations prevent infiltration of endothelial cells and decrease grafts long-term patency, particularly in small diameter vessels. We aimed to design a curved structural reinforced small intestinal submucosa (SIS) vascular graft for hemodialysis access and to evaluate in a porcine animal model graft patency by Doppler ultrasonography, tissue remodeling by histology, and vascular wall Young's modulus after implantation by biaxial tensile test...
March 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
Annika Senghaas, Thomas Kremer, Volker J Schmidt, Leila Harhaus, Christoph Hirche, Ulrich Kneser, Amir K Bigdeli
Despite considerable advances in reconstructive surgery, massive abdominal wall defects continue to pose a significant surgical challenge. We report the case of a 72-year-old morbidly obese female patient with Clostridium septicum-related gas gangrene of the abdominal wall. After multidisciplinary treatment and multiple extensive debridements, a massive full-thickness defect (40 cm × 35 cm) of the right abdominal wall was present. The abdominal contents were covered with a resorbable mesh to prevent evisceration...
February 16, 2018: Microsurgery
Masashi Kamioka, Naoko Hijioka, Yoshiyuki Matsumoto, Minoru Nodera, Takashi Kaneshiro, Hitoshi Suzuki, Yasuchika Takeishi
BACKGROUND: To investigate the impact of uncontrolled blood pressure (BP) on left atrial (LA) remodeling and clinical outcome after pulmonary vein isolation (PVI) in paroxysmal atrial fibrillation (AF). METHODS: One hundred and one symptomatic paroxysmal AF patients (85 males, 62.2±8.4 year-old) who underwent successful PVI were classified as follows: group 1 (n = 46), no hypertension (HTN); group 2 (n = 36), HTN with controlled BP; and group 3 (n = 19), HTN with uncontrolled BP...
February 15, 2018: Pacing and Clinical Electrophysiology: PACE
Xi Zeng, Ping Huang, Mingkai Chen, Shiqian Liu, Nannan Wu, Fang Wang, Jing Zhang
The aim of the present study was to elucidate the effect of transmembrane protein 16A (TMEM16A) on portal vein smooth muscle cell (PVSMC) proliferation associated with portal vein remodeling in portal hypertension (PHT). Sprague-Dawley rats were subjected to bile duct ligation to establish a rat model of liver cirrhosis and PHT. Sham-operated animals served as controls. At 8 weeks after bile duct ligation, the extent of liver fibrosis and the portal vein wall thickness were assessed using hematoxylin-eosin staining...
January 2018: Experimental and Therapeutic Medicine
Vedran Premuzic, Lea Katalinic, Marijan Pasalic, Hrvoje Jurin
Cardiac tamponade caused by perforation of the cardiac wall is a rare complication related to central venous catheter (CVC) placement. A 71-year-old female with a previous history of moderate aortic stenosis and kidney transplantation was admitted to hospital due to global heart failure and worsening of allograft function. Intensified hemodialysis was commenced through a CVC placed in the right subclavian vein. Chest radiography revealed catheter tip in the right atrium and no signs of pneumothorax. Thorough diagnostics outruled immediate life-threatening conditions, such as myocardial infarction and pulmonary embolism...
January 2018: Saudi Journal of Anaesthesia
Raffaele Dalla Valle, Matteo Rossini, Laura Lamecchi, Maurizio Iaria
Pancreatic fistula (PF) remains the Achilles' heel of pancreaticoduodenectomy (PD). Pancreaticogastrostomy (PG) appears to be associated with a lower risk of postoperative leak according to recent evidence. We started to fashion PG, especially in soft pancreas, modifying the original technique described by Bassi. At our institution, 105 PD procedures were carried out from January 2011 to December 2016; pancreatic-enteric continuity was restored by PG in 35 cases. Superior mesenteric/portal vein resection/reconstruction was necessary in three patients...
January 31, 2018: Updates in Surgery
Yongjie Yuan, Si Yang, Chao Li, Kan Xu, Jinlu Yu
In the present study, a recombinant adeno-associated virus vector containing the calcitonin gene related peptide gene (rAAV-CGRP) was constructed and the therapeutic effect of rAAV-CGRP on a chick umbilical artery vasospasm model induced by chick embryo allantoic cavity hemorrhage was investigated. Fresh specific pathogen-free fertilized chicken eggs were randomly divided into a rAAV-CGRP group, an empty vector virus (AAV) group, and a control group, with 24 eggs in each group. An umbilical arterial vasospasm model was established using a needle puncture method on a vein in the chorioallantoic membrane to induce a hemorrhage in the allantoic cavity of 11-day-old chicken embryonated eggs...
January 2018: Experimental and Therapeutic Medicine
Yu Yeon Jung, Ki Cheon Kim, Mi Hee Park, Youngsik Seo, Heonyong Park, Min Hee Park, Jun Chang, Dae Youn Hwang, Sang Bae Han, Sanghyeon Kim, Dong Ju Son, Jin Tae Hong
Although the important role of amyloid precursor protein (APP) in vascular diseases associated with Alzheimer's disease (AD) has been demonstrated, the underlying molecular mechanisms and physiological consequences are unclear. We aimed to evaluate vascular inflammation and atherosclerosis in Swedish mutant of human APP transgenic (APPsw-Tg) and ApoE-/-/APPsw-Tg mice. We also aimed to explore the mechanisms underlying any changes observed in these mice compared with non-Tg controls. Methods: The transgenic and non-Tg mouse strains were subjected to partial ligation of the left carotid artery to induce atherosclerotic changes, which were measured using histological approaches, immunohistochemistry, quantitative polymerase chain reaction, and gene expression microarrays...
2018: Theranostics
Yuki Ikeda, Shunsuke Ishii, Mayu Yazaki, Teppei Fujita, Yuichiro Iida, Toyoji Kaida, Takeru Nabeta, Eiji Nakatani, Emi Maekawa, Tomoyoshi Yanagisawa, Toshimi Koitabashi, Takayuki Inomata, Junya Ako
An interaction between the intestine and cardiovascular disease has been suggested. We thought to clarify the association between intestinal conditions and clinical outcomes in patients with heart failure (HF). Hemodynamic parameters in intestinal vessels [superior mesenteric artery (SMA), inferior mesenteric artery (IMA), and portal vein (PV)] and average colon wall thickness (aCWT) from the ascending colon to sigmoid colon were evaluated in 224 hospitalized HF patients. Echocardiographic parameters and composite event rates (all-cause mortality, readmission for HF deterioration, major ventricular arrhythmias) were also examined...
January 11, 2018: Heart and Vessels
Tim Vandecasteele, Stijn Schauvliege, Matthew Philpott, Eli Clement, Gunther van Loon, Lisse Vera, Tim Boussy, Thomas van Bergen, Wim Van Den Broeck, Pieter Cornillie, Glenn Van Langenhove
BACKGROUND: Recurrence of atrial fibrillation after an ablation procedure remains a major problem which emphasizes the need for improved pulmonary vein isolation techniques. AIMS: The aim of this study was to describe an implantation procedure of a pulmonary vein-stent which may possibly serve as an ablation technique in the future and to examine stent safety in a follow-up study in pigs. METHODS AND RESULTS: Eight pigs were catheterized and nine self-expanding nitinol stents were implanted through a transfemoral or transatrial approach into the antra of the pulmonary veins...
January 8, 2018: Pacing and Clinical Electrophysiology: PACE
A A Fokin, D A Borsuk, E L Kazachkov, G L Gorelik, K V Bagaev
The purpose of the study was to assess the depth of damage to the venous wall after endovenous laser coagulation (EVLC) at different power of the unit - 5, 7 and 10 W and similar linear density of energy (LDE) - approximately 70 J/cm. Our prospective comparative morphological study with blinding included a total of 30 patients subjected to EVLC of the great saphenous vein using the unit with a wavelength of 1,470 nm and radial light guides with automatic traction. The patients were divided into three groups, each comprising 10 patients...
2017: Angiologii︠a︡ i Sosudistai︠a︡ Khirurgii︠a︡, Angiology and Vascular Surgery
Kinga Jaworska, Tomasz Huc, Emilia Samborowska, Leszek Dobrowolski, Klaudia Bielinska, Maciej Gawlak, Marcin Ufnal
An increased blood trimethylamine N-oxide (TMAO) has emerged as a marker of cardiovascular mortality, however, the mechanisms of the increase are not clear. We evaluated if hypertension was associated with changes in the colon permeability to trimethylamine (TMA), a TMAO precursor. We did experiments on male, 24-26-week-old normotensive Wistar-Kyoto rats (WKY), spontaneously hypertensive rats (SHR) and SHR treated with enalapril, an antihypertensive drug (SHR-E). To check the colon permeability and liver TMA clearance, blood was collected from the portal vein and hepatic veins confluence, at baseline and after the intracolonic administration of TMA...
2017: PloS One
Dong Yeon Kim, Junho Lee, Jeong Tae Kim, Hye Kyung Chang, Suk-Ho Moon
An extensive 35 × 20 cm sized full-thickness abdominal wall defect was created after resection of aggressive abdominal fibromatosis in a 19-year-old male patient. Immediate reconstruction was not possible due to prolonged operation time and resulting severe bowel edema. A silicone sheet with NPWT was applied over the exposed viscera. After 1 week, silicone sheet was substituted with a composite mesh. Then, abdominal wall reconstruction with bilateral free anterolateral thigh (ALT) flaps (30 × 12 cm and 25 × 12 cm sized) was performed...
December 12, 2017: Microsurgery
Hao-Yang Mi, Xin Jing, Emily Yu, Xiaofeng Wang, Qian Li, Lih-Sheng Turng
The success of blood vessel transplants with vascular scaffolds (VSs) highly depends on their structure and mechanical properties. The fabrication of small diameter vascular scaffolds (SDVSs) mimicking the properties of native blood vessels has been a challenge. Herein, we propose a facile method to fabricate thermoplastic polyurethane (TPU)/polycaprolactone (PCL) hybrid SDVSs via electrospinning using a modified rotating collector. By varying the ratio between the TPU and the PCL, and changing the electrospinning volume, SDVSs with a wavy configuration and different properties could be obtained...
February 2018: Journal of the Mechanical Behavior of Biomedical Materials
Cheng-Gui Wang, Yi-Ting Lou, Min-Ji Tong, Li-Lian Zhang, Zeng-Jie Zhang, Yong-Zeng Feng, Shi Li, Hua-Zi Xu, Cong Mao
Wound therapy remains a clinical challenge due to the complexity of healing pathology and high demand of achieving functional and aesthetically satisfactory scars. Newly formed blood vessels are essential for tissue repair since they can support cells at the wound site with nutrition and oxygen. In this study, we investigated the effects of Asperosaponin VI (ASA VI) isolated from a traditional Chinese medicine, the root of Dipsacus asper Wall, in promoting angiogenesis, as well as its function in wound therapeutics...
March 2018: Acta Pharmacologica Sinica
Samir Rabadiya, Shradhha Bhadada, Ashvin Dudhrejiya, Devendra Vaishnav, Bhoomika Patel
Estrogen is known to exhibit cardioprotective and antihyperlipidemic action. Valproic acid has been shown to upregulate estrogen receptors (ERs) in breast and prostate cancer tissues. No pharmacological evaluations for magnesium valproate (MgV) so far have been done for diabetic cadio-lipidemic complications. Based on the above context, current study was undertaken to evaluate the therapeutic effectiveness of MgV in cardiac complications associated with type-1 diabetes mellitus in rats wherein diabetes was induced by single tail vein injection of streptozotocin (STZ, 45mg/kg, IV) in female Sprague Dawley rats and treatment of MgV (210mg/kg, PO) was given for eight weeks to diabetic animals, after which, various biochemical and cardiac biomarkers, hypertrophic, hemodynamic and histological parameters along with immunohistochemistry of ERs in the left ventricle (LV) were estimated...
November 7, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
Clinton D Protack, Trenton R Foster, Takuya Hashimoto, Kota Yamamoto, Monica Y Lee, Jan R Kraehling, Hualong Bai, Haidi Hu, Toshihiko Isaji, Jeans M Santana, Mo Wang, William C Sessa, Alan Dardik
Low rates of arteriovenous fistula (AVF) maturation prevent optimal fistula use for hemodialysis; however, the mechanism of venous remodeling in the fistula environment is not well understood. We hypothesized that the embryonic venous determinant Eph-B4 mediates AVF maturation. In human AVF and a mouse aortocaval fistula model, Eph-B4 protein expression increased in the fistula vein; expression of the arterial determinant Ephrin-B2 also increased. Stimulation of Eph-B-mediated signaling with Ephrin-B2/Fc showed improved fistula patency with less wall thickness...
November 13, 2017: Scientific Reports
Deng-Feng Fang, Hong-Wei Zhang, Jun Gu, Kang-Jun Fan, Huai-Min Liang, Jia-Yu Shen, Er-Yong Zhang, Jia Hu
OBJECTIVE: This study was designed to assess the vessel wall characteristics and the expression levels of bone morphogenic protein4(BMP4) and proliferating cell antigen Ki67 in vein grafts harvested from diabetic rats,and to investigate the role of BMP4 in progression of vein graft hyperplastic remodeling under hyperglycemic condition. METHODS: 48 male SpragueDawky rats [body mass (194±16) g] aged 8 weeks were randomly divided into diabetes mellitus (DM) group ( n=24) and nondiabetes mellitus (NDM) group ( n=24)...
September 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
Jing Lin, Linfang Lan, Dilong Wang, Baoshan Qiu, Yuhua Fan
To mimic the expected pathological changes of white matter lesions (WMLs) and increase the stability, we applied modified two-vessel occlusion (modified 2VO) (1-week interval bilateral carotid artery occlusion) in stroke-prone renovascular hypertensive rats (RHRSP) and established a modified WMLs model (RHRSP/modified 2VO) that compared their phenotypes with RHRSP and sham-operated rats. In addition, we tried to differentiate small veins from small arteries through the presence of smooth muscle to study the pathological changes of small veins detailed in the model...
December 26, 2017: Neuroscience
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