Database : MEDLINE
Search on : Veins [Words]
References found : 156168 [refine]
Displaying: 1 .. 10   in format [Detailed]

page 1 of 15617 go to page                         

  1 / 156168 MEDLINE  
              next record last record
select
to print
Photocopy
Full text

[PMID]: 25127225
[Au] Autor:Chaoui R; Heling KS; Karl K
[Ad] Address:Praxis, Pränataldiagnostik Friedrichstraße, Berlin.
[Ti] Title:Ultrasound of the fetal veins part 2: veins at the cardiac level.
[So] Source:Ultraschall Med;35(4):302-21, 2014 Aug.
[Is] ISSN:1438-8782
[Cp] Country of publication:Germany
[La] Language:eng
[Ab] Abstract:In recent years the advent of high-resolution and color Doppler ultrasound has enabled a more comprehensive examination of the veins at the cardiac level. These veins include both the superior and inferior vena cava, the pulmonary veins, the azygos vein, the coronary sinus, and the brachiocephalic (or innominate) vein. This article gives a review of the normal and abnormal conditions of the cardiac venous system. Normal anatomy and abnormal findings of these veins are demonstrated by grayscale and color Doppler. Three groups of anomalies are presented: 1) the interrupted inferior vena cava with azygos continuity, 2) the left persisting superior vena cava and 3) the total and partial anomalous pulmonary venous connections. Many of these abnormal findings can be detected by a dedicated examination of the veins during fetal echocardiography, but some anomalies are detectable by focusing on indirect signs such as the compensatory dilation of other veins.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1408
[Js] Journal subset:IM
[St] Status:In-Data-Review
[do] DOI:10.1055/s-0034-1366848

  2 / 156168 MEDLINE  
              first record previous record next record last record
select
to print
Photocopy
Full text

[PMID]: 24925981
[Au] Autor:Stack A; Derksen FJ; Williams KJ; Robinson NE; Jackson WF
[Ad] Address:Department of Large Animal Clinical Sciences, Michigan State University, East Lansing, Michigan;...
[Ti] Title:Lung region and racing affect mechanical properties of equine pulmonary microvasculature.
[So] Source:J Appl Physiol (1985);117(4):370-6, 2014 Aug 15.
[Is] ISSN:1522-1601
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Exercise-induced pulmonary hemorrhage is a performance-limiting condition of racehorses associated with severe pathology, including small pulmonary vein remodeling. Pathology is limited to caudodorsal (CD) lung. Mechanical properties of equine pulmonary microvasculature have not been studied. We hypothesized that regional differences in pulmonary artery and vein mechanical characteristics do not exist in control animals, and that racing and venous remodeling impact pulmonary vein mechanical properties in CD lung. Pulmonary arteries and veins [range of internal diameters 207-386 ± 67 µm (mean ± SD)] were harvested from eight control and seven raced horses. With the use of wire myography, CD and cranioventral (CV) vessels were stretched in 10-µm increments. Peak wall tension was plotted against changes in diameter (length). Length-tension data were compared between vessel type, lung region, and horse status (control and raced). Pulmonary veins are stiffer walled than arteries. CD pulmonary arteries are stiffer than CV arteries, whereas CV veins are stiffer than CD veins. Racing is associated with increased stiffness of CD pulmonary veins and, to a lesser extent, CV arteries. For example, at 305 µm, tension in raced and control CD veins is 27.74 ± 2.91 and 19.67 ± 2.63 mN/mm (means ± SE; P < 0.05, Bonferroni's multiple-comparisons test after two-way ANOVA), and 16.12 ± 2.04 and 15.07 ± 2.47 mN/mm in raced and control CV arteries, respectively. This is the first report of an effect of region and/or exercise on mechanical characteristics of small pulmonary vessels. These findings may implicate pulmonary vein remodeling in exercise-induced pulmonary hemorrhage pathogenesis.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1408
[Js] Journal subset:IM
[St] Status:In-Data-Review
[do] DOI:10.1152/japplphysiol.00314.2014

  3 / 156168 MEDLINE  
              first record previous record next record last record
select
to print
Photocopy
Full text

[PMID]: 25075936
[Au] Autor:Wang Z; Liu X; Kang H; Sun A; Fan Y; Deng X
[Ad] Address:Key Laboratory for Biomechanics and Mechanobiology of Ministry of Education, School of Biological Science and Medical Engineering, Beihang University, Beijing 100191, China....
[Ti] Title:Enhanced accumulation of LDLs within the venous graft wall induced by elevated filtration rate may account for its accelerated atherogenesis.
[So] Source:Atherosclerosis;236(1):198-206, 2014 Sep.
[Is] ISSN:1879-1484
[Cp] Country of publication:Ireland
[La] Language:eng
[Ab] Abstract:OBJECTIVE: To test the hypothesis that the venous graft when implanted in an arterial bypass might endure a significantly elevated water filtration rate, leading to fast infiltration/accumulation of low-density lipoproteins (LDLs) within the graft wall and hence the accelerated atherogenesis. METHODS: We measured filtration rates of the swine femoral artery and lateral saphenous vein under venous and arterial hemodynamic conditions in vitro. Based on the measured filtration rates, we numerically simulated LDL transport in an arterial bypass model with a venous graft. Moreover, in order to validate the theoretical prediction, we measured DiI-LDLs uptake by both arteries and veins under arterial condition. RESULTS: The experimental results showed that when subjected to arterial hemodynamic condition, the filtration rate of the venous wall was increased sharply, and significantly higher than that of the artery. Moreover, different from the hydraulic conductivity of artery, the venous one would increase with increasing pressure. The numerical results showed that for the venous graft, both luminal surface LDL concentration and LDL accumulation within the vessel wall were significantly higher than those for the host artery. In addition, the experiment, which was used to confirm theoretical prediction, showed that the amount of DiI-LDLs uptake by the venous wall was much higher compared with arterial wall. CONCLUSION: The present study suggests that the accelerated atherogenesis of the venous graft is attributable to its elevated filtration rate that may lead to both aggravated concentration polarization of LDLs and enhanced convective transport of LDLs into the graft wall.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1408
[Js] Journal subset:IM
[St] Status:In-Data-Review

  4 / 156168 MEDLINE  
              first record previous record next record last record
select
to print
Photocopy
Full text

[PMID]: 24994853
[Au] Autor:Shang Q; Guo GL; Honda A; Shi D; Saumoy M; Salen G; Xu G
[Ad] Address:Department of Medicine, Rutgers, New Jersey Medical School, Newark, New Jersey; Medical Research Service, Veterans Affairs Medical Center, East Orange, New Jersey;...
[Ti] Title:Bile acid flux through portal but not peripheral veins inhibits CYP7A1 expression without involvement of ileal FGF19 in rabbits.
[So] Source:Am J Physiol Gastrointest Liver Physiol;307(4):G479-86, 2014 Aug 15.
[Is] ISSN:1522-1547
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:It was proposed that CYP7A1 expression is suppressed through the gut-hepatic signaling pathway fibroblast growth factor (FGF) 15/19-fibroblast growth factor receptor 4, which is initiated by activation of farnesoid X receptor in the intestine rather than in the liver. The present study tested whether portal bile acid flux alone without ileal FGF19 could downregulate CYP7A1 expression in rabbits. A rabbit model was developed by infusing glycodeoxycholic acid (GDCA) through the splenic vein to bypass ileal FGF19. Study was conducted in four groups of rabbits: control; bile fistula + bovine serum albumin solution perfusion (BF); BF + GDCA (by portal perfusion); and BF + GDCA-f (by femoral perfusion). Compared with only BF, BF + GDCA (6 h portal perfusion) suppressed CYP7A1 mRNA, whereas BF + GDCA-f (via femoral vein) with the same perfusion rate of GDCA did not show inhibitory effects. Meanwhile, there was a decrease in ileal FGF19 expression and portal FGF19 protein levels, but an equivalent increase in biliary bile acid outputs in both GDCA perfusion groups. This study demonstrated that portal bile acid flux alone downregulated CYP7A1 expression with diminished FGF19 expression and protein levels, whereas the same bile acid flux reaching the liver through the hepatic artery via femoral vein had no inhibitory effect on CYP7A1. We propose that bile acid flux through the portal venous system may be a kind of "intestinal factor" that suppresses CYP7A1 expression.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1408
[Js] Journal subset:IM
[St] Status:In-Data-Review
[do] DOI:10.1152/ajpgi.00062.2014

  5 / 156168 MEDLINE  
              first record previous record next record last record
select
to print
Photocopy
Full text

[PMID]: 24923249
[Au] Autor:Liu S; Mok K; Neelavalli J; Cheng YC; Tang J; Ye Y; Haacke EM
[Ad] Address:School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada.
[Ti] Title:Improved MR venography using quantitative susceptibility-weighted imaging.
[So] Source:J Magn Reson Imaging;40(3):698-708, 2014 Sep.
[Is] ISSN:1522-2586
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:PURPOSE: To remove the geometry dependence of phase-based susceptibility weighting masks in susceptibility-weighted imaging (SWI) and to improve the visualization of the veins and microbleeds. MATERIALS AND METHODS: True SWI (tSWI) was generated using susceptibility-based masks. Simulations were used to evaluate the influence of the characteristic parameters defining the mask. In vivo data from three healthy adult human volunteers were used to compare the contrast-to-noise-ratios (CNRs) of the right septal vein and the left internal cerebral vein as measured from both tSWI and SWI data. A traumatic brain injury (TBI) patient dataset was used to illustrate qualitatively the proper visualization of microbleeds using tSWI. RESULTS: Compared with conventional SWI, tSWI improved the CNR of the two selected veins by a factor of greater than three for datasets with isotropic resolution and greater than 30% for datasets with anisotropic resolution. Veins with different orientations can be properly enhanced in tSWI. Furthermore, the blooming artifact due to the strong dipolar phase of microbleeds in conventional SWI was reduced in tSWI for the TBI case. CONCLUSION: The use of tSWI overcomes the geometric limitations of using phase and provides better visualization of the venous system, especially for data collected with isotropic resolution. J. Magn. Reson. Imaging 2014;40:698-708. © 2013 Wiley Periodicals, Inc.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1408
[Js] Journal subset:IM
[St] Status:In-Data-Review
[do] DOI:10.1002/jmri.24413

  6 / 156168 MEDLINE  
              first record previous record next record last record
select
to print
Photocopy
PubMed Central Full text
Full text

[PMID]: 25114819
[Au] Autor:Díaz-Murillo R; Tobías-González P; López-Magallón S; Magdaleno-Dans F; Bartha JL
[Ad] Address:Division of Maternal Fetal Medicine, Department of Obstetrics and Gynecology, University Hospital La Paz, Paseo de la Castellana 261, 28046 Madrid, Spain....
[Ti] Title:Spontaneous Hemoperitoneum due to Rupture of Uterine Varicose Veins during Labor Successfully Treated by Percutaneous Embolization.
[So] Source:Case Rep Obstet Gynecol;2014:580384, 2014.
[Is] ISSN:2090-6684
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Hemoperitoneum during pregnancy is a rare but potentially lethal clinical condition. Improvements in antenatal and intrapartum care, especially in surgical and anesthetic techniques, have reduced maternal mortality; perinatal mortality remains very high (31%). Treatment is based on the systemic correction of hypovolemia and immediate surgery via laparotomy or laparoscopy in cases in the first trimester of pregnancy for hemostatic purposes. Sometimes, hysterectomy is needed. A 35-year-old Asiatic primigravid woman at 37 weeks' gestation with otherwise uneventful pregnancy came to the hospital referring abrupt-onset lumbar and abdominal pain. A bleeding uterine superficial varicocele of about 7 cm was found on the left uterine horn during Caesarean section. Interventional radiologic embolization of both uterine arteries was successfully performed. Posterior evolution of the patient was favorable. Percutaneous vascular embolization of the uterine arteries is an effective alternative treatment for many obstetrical and gynecological causes of bleeding. The main advantage of this technique is the low rate of serious complications and the preservation of reproductive function. To our knowledge, this is the first case of spontaneous intrapartum hemoperitoneum treated with this technique. An early diagnosis and a rapid indication of this therapeutic option are essential. Hemodynamic stability is needed to decide this conservative management.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1408
[Cu] Class update date: 140815
[Lr] Last revision date:140815
[Da] Date of entry for processing:140812
[St] Status:PubMed-not-MEDLINE
[do] DOI:10.1155/2014/580384

  7 / 156168 MEDLINE  
              first record previous record next record last record
select
to print
Photocopy
PubMed Central Full text
Full text

[PMID]: 25072663
[Au] Autor:Arita Y; Nakaoka Y; Matsunaga T; Kidoya H; Yamamizu K; Arima Y; Kataoka-Hashimoto T; Ikeoka K; Yasui T; Masaki T; Yamamoto K; Higuchi K; Park JS; Shirai M; Nishiyama K; Yamagishi H; Otsu K; Kurihara H; Minami T; Yamauchi-Takihara K; Koh GY; Mochizuki N; Takakura N; Sakata Y; Yamashita JK; Komuro I
[Ad] Address:Department of Cardiovascular Medicine, Osaka University Graduate School of Medicine, 2-2, Yamadaoka, Suita, Osaka 565-0871, Japan....
[Ti] Title:Myocardium-derived angiopoietin-1 is essential for coronary vein formation in the developing heart.
[So] Source:Nat Commun;5:4552, 2014.
[Is] ISSN:2041-1723
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:The origin and developmental mechanisms underlying coronary vessels are not fully elucidated. Here we show that myocardium-derived angiopoietin-1 (Ang1) is essential for coronary vein formation in the developing heart. Cardiomyocyte-specific Ang1 deletion results in defective formation of the subepicardial coronary veins, but had no significant effect on the formation of intramyocardial coronary arteries. The endothelial cells (ECs) of the sinus venosus (SV) are heterogeneous population, composed of APJ-positive and APJ-negative ECs. Among these, the APJ-negative ECs migrate from the SV into the atrial and ventricular myocardium in Ang1-dependent manner. In addition, Ang1 may positively regulate venous differentiation of the subepicardial APJ-negative ECs in the heart. Consistently, in vitro experiments show that Ang1 indeed promotes venous differentiation of the immature ECs. Collectively, our results indicate that myocardial Ang1 positively regulates coronary vein formation presumably by promoting the proliferation, migration and differentiation of immature ECs derived from the SV.
[Pt] Publication type:JOURNAL ARTICLE
[Em] Entry month:1407
[Js] Journal subset:IM
[St] Status:In-Data-Review
[do] DOI:10.1038/ncomms5552

  8 / 156168 MEDLINE  
              first record previous record next record last record
select
to print
Photocopy
PubMed Central Full text
Full text

[PMID]: 24863258
[Au] Autor:Schmidt K; Kolesnik B; Gorren AC; Werner ER; Mayer B
[Ad] Address:Department of Pharmacology and Toxicology, Karl-Franzens-Universität Graz, A-8010 Graz, Austria. Electronic address: kurt.schmidt@uni-graz.at....
[Ti] Title:Cell type-specific recycling of tetrahydrobiopterin by dihydrofolate reductase explains differential effects of 7,8-dihydrobiopterin on endothelial nitric oxide synthase uncoupling.
[So] Source:Biochem Pharmacol;90(3):246-53, 2014 Aug 1.
[Is] ISSN:1873-2968
[Cp] Country of publication:England
[La] Language:eng
[Ab] Abstract:(6R)-5,6,7,8-Tetrahydro-L-biopterin (BH4) availability regulates nitric oxide and superoxide formation by endothelial nitric oxide synthase (eNOS). At low BH4 or low BH4 to 7,8-dihydrobiopterin (BH2) ratios the enzyme becomes uncoupled and generates superoxide at the expense of NO. We studied the effects of exogenously added BH2 on intracellular BH4/BH2 ratios and eNOS activity in different types of endothelial cells. Incubation of porcine aortic endothelial cells with BH2 increased BH4/BH2 ratios from 8.4 (controls) and 0.5 (BH4-depleted cells) up to ~20, demonstrating efficient reduction of BH2. Uncoupled eNOS activity observed in BH4-depleted cells was prevented by preincubation with BH2. Recycling of BH4 was much less efficient in human endothelial cells isolated from umbilical veins or derived from dermal microvessels (HMEC-1 cells), which exhibited eNOS uncoupling and low BH4/BH2 ratios under basal conditions and responded to exogenous BH2 with only moderate increases in BH4/BH2 ratios. The kinetics of dihydrofolate reductase-catalyzed BH4 recycling in endothelial cytosols showed that the apparent BH2 affinity of the enzyme was 50- to 300-fold higher in porcine than in human cell preparations. Thus, the differential regulation of eNOS uncoupling in different types of endothelial cells may be explained by striking differences in the apparent BH2 affinity of dihydrofolate reductase.
[Pt] Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Entry month:1407
[Js] Journal subset:IM
[St] Status:In-Process

  9 / 156168 MEDLINE  
              first record previous record next record last record
select
to print
Photocopy
Full text

[PMID]: 23848823
[Au] Autor:Gabarrós Canals A; Rodríguez-Hernández A; Young WL; Lawton MT; UCSF Brain AVM Study Project
[Ad] Address:Department of Neurological Surgery, University of California, San Francisco, California 94143-0112, USA.
[Ti] Title:Temporal lobe arteriovenous malformations: anatomical subtypes, surgical strategy, and outcomes.
[So] Source:J Neurosurg;119(3):616-28, 2013 Sep.
[Is] ISSN:1933-0693
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:OBJECT: Descriptions of temporal lobe arteriovenous malformations (AVMs) are inconsistent. To standardize reporting, the authors blended existing descriptions in the literature into an intuitive classification with 5 anatomical subtypes: lateral, medial, basal, sylvian, and ventricular. The authors' surgical experience with temporal lobe AVMs was reviewed according to these subtypes. METHODS: Eighty-eight patients with temporal lobe AVMs were treated surgically. RESULTS: Lateral temporal lobe AVMs were the most common (58 AVMs, 66%). Thirteen AVMs (15%) were medial, 9 (10%) were basal, and 5 (6%) were sylvian. Ventricular AVMs were least common (3 AVMs, 3%). A temporal craniotomy based over the ear was used in 64%. Complete AVM resection was achieved in 82 patients (93%). Four patients (5%) died in the perioperative period (6 in all were lost to follow-up); 71 (87%) of the remaining 82 patients had good outcomes (modified Rankin Scale scores 0-2); and 68 (83%) were unchanged or improved after surgery. CONCLUSIONS: Categorization of temporal AVMs into subtypes can assist with surgical planning and also standardize reporting. Lateral AVMs are the easiest to expose surgically, with circumferential access to feeding arteries and draining veins at the AVM margins. Basal AVMs require a subtemporal approach, often with some transcortical dissection through the inferior temporal gyrus. Medial AVMs are exposed tangentially with an orbitozygomatic craniotomy and transsylvian dissection of anterior choroidal artery and posterior cerebral artery feeders in the medial cisterns. Medial AVMs posterior to the cerebral peduncle require transcortical approaches through the temporo-occipital gyrus. Sylvian AVMs require a wide sylvian fissure split and differentiation of normal arteries, terminal feeding arteries, and transit arteries. Ventricular AVMs require a transcortical approach through the inferior temporal gyrus that avoids the Meyer loop. Surgical results with temporal lobe AVMs are generally good, and classifying them does not offer any prediction of surgical risk.
[Mh] MeSH terms primary: Intracranial Arteriovenous Malformations
Neurosurgical Procedures/methods
Temporal Lobe
[Mh] MeSH terms secundary: Adolescent
Adult
Aged
Child
Craniotomy/methods
Female
Humans
Intracranial Arteriovenous Malformations/classification
Intracranial Arteriovenous Malformations/surgery
Male
Middle Aged
Neurosurgical Procedures/mortality
Temporal Lobe/blood supply
Temporal Lobe/surgery
Treatment Outcome
Young Adult
[Pt] Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL; RESEARCH SUPPORT, NON-U.S. GOV'T
[Em] Entry month:1311
[Cu] Class update date: 140815
[Lr] Last revision date:140815
[Js] Journal subset:AIM; IM
[Da] Date of entry for processing:130902
[St] Status:MEDLINE
[do] DOI:10.3171/2013.6.JNS122333

  10 / 156168 MEDLINE  
              first record previous record
select
to print
Photocopy
PubMed Central Full text
Full text

[PMID]: 23678042
[Au] Autor:Kang L; Grande JP; Farrugia G; Croatt AJ; Katusic ZS; Nath KA
[Ad] Address:Mayo Clinic, Guggenheim 542, 200 First St. SW, Rochester, MN 55905. nath.karl@mayo.edu.
[Ti] Title:Functioning of an arteriovenous fistula requires heme oxygenase-2.
[So] Source:Am J Physiol Renal Physiol;305(4):F545-52, 2013 Aug 15.
[Is] ISSN:1522-1466
[Cp] Country of publication:United States
[La] Language:eng
[Ab] Abstract:Heme oxygenase-2 (HO-2), the constitutive isoform of the heme-degrading enzyme heme oxygenase, may serve as an anti-inflammatory vasorelaxant, in part, by generating carbon monoxide. Arteriovenous fistulas (AVFs) are employed as hemodialysis vascular accesses because they provide an accessible, high-blood-flow vascular segment. We examined the role of vascular expression of HO-2 in AVF function. An AVF was created in mice by anastomosing the carotid artery to the jugular vein. HO-2 expression was detected by immunohistochemistry in the intact carotid artery, mainly in endothelial cells and smooth muscle cells; expression of HO-2 protein and mRNA was modestly increased in the artery of the AVF. Creating an AVF in HO-2(-/-) mice compared with an AVF in HO-2(+/+) mice led to markedly reduced AVF blood flow and increased numbers of nonfunctioning AVFs. The impairment of AVF function in the setting of HO-2 deficiency could not be ascribed to either preexisting intrinsic abnormalities in endothelium-dependent and endothelium-independent relaxation of the carotid artery in HO-2-deficient mice or to impaired vasorelaxant responses in the intact carotid artery in vivo. HO-1 mRNA was comparably induced in the AVF in HO-2(+/+) and HO-2(-/-) mice, whereas the AVF in HO-2(-/-) mice compared with that in HO-2(+/+) mice exhibited exaggerated induction of matrix metalloproteinase (MMP)-9 but similar induction of MMP-2. HO-2 deficiency also led to lower AVF blood flow when AVFs were created in uremia, the latter induced by subtotal nephrectomy. We conclude that HO-2 critically contributes to the adequacy of AVF blood flow and function.
[Mh] MeSH terms primary: Arteriovenous Fistula/metabolism
Carotid Arteries/metabolism
Heme Oxygenase (Decyclizing)/metabolism
Renal Insufficiency, Chronic/metabolism
[Mh] MeSH terms secundary: Animals
Arteriovenous Fistula/physiopathology
Immunohistochemistry
Jugular Veins
Male
Mice
Mice, Inbred C57BL
[Pt] Publication type:JOURNAL ARTICLE; RESEARCH SUPPORT, N.I.H., EXTRAMURAL
[Nm] Name of substance:EC 1.14.99.3 (Heme Oxygenase (Decyclizing)); EC 1.14.99.3 (heme oxygenase-2)
[Em] Entry month:1312
[Cu] Class update date: 140815
[Lr] Last revision date:140815
[Js] Journal subset:IM
[Da] Date of entry for processing:130816
[St] Status:MEDLINE
[do] DOI:10.1152/ajprenal.00234.2013


page 1 of 15617 go to page                         
   


Refine the search
  Database : MEDLINE Advanced form   

    Search in field  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/PAHO/WHO - Latin American and Caribbean Center on Health Sciences Information