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Flow mediated dilation

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https://www.readbyqxmd.com/read/28441694/arterial-stiffness-is-increased-in-nondiabetic-nonhypertensive-postmenopausal-women-with-nonalcoholic-fatty-liver-disease
#1
Xia Li, HuiRong Shi, Zhuo Wang, Lei Chang, MingHui Zhang, XiaoFang Dong
OBJECTIVES: The purpose of this study was to assess the relationship between nonalcoholic fatty liver disease (NAFLD) and arterial stiffness in nondiabetic, nonhypertensive postmenopausal women with and without metabolic syndrome. METHODS: We divided 1007 postmenopausal women into two groups (NAFLD and controls) and then three groups (NAFLD with metabolic syndrome, NAFLD without metabolic syndrome, and controls), respectively. To exclude the influence of confounding factors, we studied a specifically selected group with no additional cardiovascular risk...
June 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28441692/physiological-role-of-endothelin-1-in-flow-mediated-vasodilatation-in-humans-and-impact-of-cardiovascular-risk-factors
#2
Jérémy Bellien, Michèle Iacob, Christelle Monteil, Isabelle Rémy-Jouet, Clothilde Roche, Thomas Duflot, Cathy Vendeville, Laurence Gutierrez, Christian Thuillez, Vincent Richard, Robinson Joannidès
OBJECTIVES: The current study addressed the hypothesis that the local decrease in endothelin-1 (ET-1) bioavailability during sustained flow increases contributes to endothelium-dependent, flow-mediated dilatation (FMD) of conduit arteries and is altered in presence of cardiovascular risk factors. METHODS AND RESULTS: In nine young healthy individuals, the decrease in local ET-1 plasma levels and radial artery FMD in response to hand skin heating (from 34 to 44 °C) was not affected by endothelin type A (ETA) receptor blockade, achieved using the brachial infusion of BQ-123 (100 nmol/min per l of forearm), as compared with physiological saline (0...
June 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28438762/etb-receptor-contribution-to-vascular-dysfunction-in-postmenopausal-women
#3
Megan M Wenner, Kelly N Sebzda, Andrew V Kuczmarski, Ryan T Pohlig, David G Edwards
Endothelin-1 (ET-1) contributes to age-related endothelial dysfunction in men via the ETA receptor. However, there are sex differences in the ET-1 system, and ETB receptors are modulated by sex hormones. The purpose of this study was to test the hypothesis that ETB receptors contribute to impaired vasodilatory function in postmenopausal women (PMW). We measured flow-mediated dilation (FMD) using ultrasound, and cutaneous nitric oxide-mediated vasodilation during local heating (42°C) via laser Doppler flowmetry in 18 young (YW; 22±1 years) and 16 PMW (56±1 years)...
April 24, 2017: American Journal of Physiology. Regulatory, Integrative and Comparative Physiology
https://www.readbyqxmd.com/read/28430921/association-between-cardiovascular-health-and-endothelial-function-with-future-erectile-dysfunction-the-multi-ethnic-study-of-atherosclerosis
#4
Abbi D Lane-Cordova, Kiarri Kershaw, Kiang Liu, David Herrington, Donald M Lloyd-Jones
BACKGROUND: The association of Cardiovascular Health (CVH; defined by the American Heart Association by assigning points for health-related behavioral and clinical factors) with endothelial and erectile dysfunction has not been reported, although endothelial and erectile dysfunction have been associated with components of CVH. METHODS: Data were collected in 1,136 men in the Multi-Ethnic Study of Atherosclerosis at baseline and erectile dysfunction status (measured by survey or medication use) at exam 5...
April 20, 2017: American Journal of Hypertension
https://www.readbyqxmd.com/read/28424211/connecting-tubule-glomerular-feedback-mediates-tubuloglomerular-feedback-resetting-post-unilateral-nephrectomy
#5
Sumit R Monu, Yilin Ren, J X Masjoan Juncos, Kristopher Kutskill, Hong Wang, Nitin Kumar, Edward L Peterson, Oscar A Carretero
Unilaterally nephrectomized rats (UNx) have higher glomerular capillary pressure (PGC) that can cause significant glomerular injury in the remnant kidney. PGC is controlled by the ratio of afferent (Af-Art) and efferent arteriole resistance. Af-Art resistance in turn is regulated by two intrinsic feedback mechanisms: 1) Tubuloglomerular feedback (TGF) that causes Af-Art constriction in response to increased NaCl in the macula densa and 2) connecting tubule glomerular feedback (CTGF) that causes Af-Art dilatation in response to an increase in NaCl transport in the connecting tubule via the epithelial sodium channel (ENaC)...
April 19, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28421814/elevated-monocyte-to-high-density-lipoprotein-cholesterol-ratio-and-endothelial-dysfunction-in-beh%C3%A3-et-disease
#6
Nusret Acikgoz, Ertuğrul Kurtoğlu, Julide Yagmur, Yelda Kapicioglu, Mehmet Cansel, Necip Ermis
Behçet disease (BD) is a multisystemic disorder characterized by endothelial dysfunction and inflammation. Monocyte to high-density lipoprotein cholesterol ratio (MHR) is a recently emerged indicator of inflammation and oxidative stress. Sixty patients with BD and 50 control individuals were included to investigate the relationship between MHR and endothelial dysfunction. Endothelial function was assessed by flow- and nitroglycerin-mediated dilatation technique (FMD and NMD, respectively). Serum high-sensitivity C-reactive protein (hsCRP) levels were measured in all study participants...
January 1, 2017: Angiology
https://www.readbyqxmd.com/read/28416190/flow-mediated-dilatation-and-progression-of-abdominal-aortic-aneurysms
#7
R Lee, K Bellamkonda, A Jones, N Killough, F Woodgate, M Williams, I Cassimjee, A Handa
OBJECTIVE/BACKGROUND: Biomarker(s) for prediction of the future progression rate of abdominal aortic aneurysms (AAA) may be useful to stratify the management of individual patients. AAAs are associated with features of systemic inflammation and endothelial dysfunction. Flow mediated dilatation (FMD) of the brachial artery is a recognised non-invasive measurement for endothelial function. We hypothesised that FMD is a potential biomarker of AAA progression and reflects the temporal changes of endothelial function during AAA progression...
April 13, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28415103/p673improvement-of-arterial-stiffness-and-myocardial-deformation-in-patients-with-poorly-controlled-diabetes-mellitus-type-2-after-optimization-of-antidiabetic-medication
#8
I Ikonomidis, G Pavlidis, V Lambadiari, F Kousathana, H Triantafyllidi, M Varoudi, D Vlastos, S Vlachos, G Dimitriadis, J Lekakis
Background: Arterial stiffness is associated with increased risk for cardiovascular disease. The purpose of this study is to investigate the arterial stiffness and myocardial deformation in patients with poorly controlled diabetes mellitus type 2 before and after glycemic control by optimal medication. Methods: In 50 patients with uncontrolled type 2 diabetes(age:52±10years)and 25 controls of similar age and sex and no atherosclerotic risk factors we measured at baseline and 6 months after glycemic control a) carotid-femoral pulse wave velocity(PWVc m/sec-Complior SP ALAM),central systolic blood pressure(cSBP -mmHg),augmentation index(AI%), of the aortic pulse wave(ArteriographTensioMed) b)S',E'(m/sec)andE'/A'of mitral annulus by Tissue Doppler c)LV longitudinal strain(GLS-%),systolic(LongSr-l/sec)and diastolic(LongSrE-l/sec)strain rate, twisting(Tw-deg),peak twisting(Tw)and untwisting(unTw-deg/sec)velocity using speckle tracking echocardiography...
December 1, 2016: European Heart Journal Cardiovascular Imaging
https://www.readbyqxmd.com/read/28411075/effect-of-gender-and-adiposity-on-in%C3%A2-vivo-vascular-function-in-young-african-americans
#9
Namrata Dass, Sindhu Kilakkathi, Brittaney Obi, Andrea Moosreiner, Shanthi Krishnaswami, Michael E Widlansky, Srividya Kidambi
The relationship between obesity and high blood pressure is not as strong among African Americans (AA) as compared to Caucasians. We designed the current study to determine the effect of adiposity on vascular endothelial function (a harbinger of hypertension) among young healthy AA without additional cardiovascular disease risk factors. A total of 108 AA subjects (46 women) between the ages of 18 and 45 years were recruited. All the subjects were normotensive, nonsmokers, and normoglycemic. Anthropometric and cardiovascular disease risk factor measurements (lipid, insulin resistance, and inflammatory markers) were obtained...
March 14, 2017: Journal of the American Society of Hypertension: JASH
https://www.readbyqxmd.com/read/28408434/renal-and-vascular-effects-of-uric-acid-lowering-in-normouricemic-patients-with-uncomplicated-type-1-diabetes
#10
Yuliya Lytvyn, Ronnie Har, Amy Locke, Vesta Lai, Derek Fong, Andrew Advani, Bruce A Perkins, David Z I Cherney
Higher plasma uric acid (PUA) levels are associated with lower GFR and higher blood pressure (BP) in patients with type 1 diabetes (T1D). Our aim was to determine the impact of PUA lowering on renal and vascular function in patients with uncomplicated T1D.T1D patients (n=49) were studied under eu- and hyperglycemic conditions at baseline and after PUA lowering with febuxostat (FBX) for 8 weeks. Healthy controls (HC) were studied under normoglycemic conditions (n=24). PUA, GFR (inulin), effective renal plasma flow (ERPF, paraaminohippurate), BP and hemodynamic responses to an infusion of angiotensin II (assessment of intrarenal RAAS) were measured pre- and post-FBX...
April 13, 2017: Diabetes
https://www.readbyqxmd.com/read/28408372/effects-of-sugar-sweetened-beverage-consumption-on-microvascular-and-macrovascular-function-in-a-healthy-population
#11
Jordan Loader, Cindy Meziat, Rani Watts, Christian Lorenzen, Dominique Sigaudo-Roussel, Simon Stewart, Cyril Reboul, Gregory Meyer, Guillaume Walther
OBJECTIVE: To assess vascular function during acute hyperglycemia induced by commercial sugar-sweetened beverage (SSB) consumption and its effect on underlying mechanisms of the nitric oxide pathway. APPROACH AND RESULTS: In a randomized, single-blind, crossover trial, 12 healthy male participants consumed 600 mL (20 oz.) of water or a commercial SSB across 2 visits. Endothelial and vascular smooth muscle functions were assessed in the microcirculation using laser speckle contrast imaging coupled with iontophoresis and in the macrocirculation using brachial artery ultrasound with flow- and nitrate-mediated dilation...
April 13, 2017: Arteriosclerosis, Thrombosis, and Vascular Biology
https://www.readbyqxmd.com/read/28407661/effect-of-saxagliptin-on-circulating-endothelial-progenitor-cells-and-endothelial-function-in-newly-diagnosed-type-2-diabetic-patients
#12
Fang Li, Jiachao Chen, Fei Leng, Zhiqiang Lu, Yan Ling
Endothelial dysfunction is associated with the risk of cardiovascular complications in diabetic patients. Endothelial progenitor cells (EPCs) and flow-mediated dilation (FMD) are common markers of endothelial function. In this study, we aim to investigate whether the DPP-4 inhibitor saxagliptin modulate EPCs number and FMD in newly diagnosed, treatment-naive type 2 diabetic patients. This was a controlled, randomized, open-label clinical trial. Saxagliptin group and metformin group consumed either saxagliptin 5 mg per day or metformin 1 500 mg per day respectively for 12 weeks...
April 13, 2017: Experimental and Clinical Endocrinology & Diabetes
https://www.readbyqxmd.com/read/28403673/mechanisms-mediating-functional-hyperemia-in-the-brain
#13
Amy R Nippert, Kyle R Biesecker, Eric A Newman
Neuronal activity within the brain evokes local increases in blood flow, a response termed functional hyperemia. This response ensures that active neurons receive sufficient oxygen and nutrients to maintain tissue function and health. In this review, we discuss the functions of functional hyperemia, the types of vessels that generate the response, and the signaling mechanisms that mediate neurovascular coupling, the communication between neurons and blood vessels. Neurovascular coupling signaling is mediated primarily by the vasoactive metabolites of arachidonic acid (AA), by nitric oxide, and by K(+)...
April 1, 2017: Neuroscientist: a Review Journal Bringing Neurobiology, Neurology and Psychiatry
https://www.readbyqxmd.com/read/28400092/commentary-on-flow-mediated-dilatation-and-the-progression-of-abdominal-aortic-aneurysms
#14
J P Archie
No abstract text is available yet for this article.
April 8, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/28399420/dietary-rose-hip-exerts-antiatherosclerotic-effects-and-increases-nitric-oxide-mediated-dilation-in-apoe-null-mice
#15
Michele Cavalera, Ulrika Axling, Catarina Rippe, Karl Swärd, Cecilia Holm
Atherosclerosis is a disease in which atheromatous plaques develop inside arteries, leading to reduced or obstructed blood flow that in turn may cause stroke and heart attack. Rose hip is the fruit of plants of the genus Rosa, belonging to the Rosaceae family, and it is rich in antioxidants with high amounts of ascorbic acid and phenolic compounds. Several studies have shown that fruits, seeds and roots of these plants exert antidiabetic, antiobesity and cholesterol-lowering effects in rodents as well as humans...
March 21, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28399007/physiologically-assessed-hot-flashes-and-endothelial-function-among-midlife-women
#16
Rebecca C Thurston, Yuefang Chang, Emma Barinas-Mitchell, J Richard Jennings, Roland von Känel, Doug P Landsittel, Karen A Matthews
OBJECTIVE: Hot flashes are experienced by most midlife women. Emerging data indicate that they may be associated with endothelial dysfunction. No studies have tested whether hot flashes are associated with endothelial function using physiologic measures of hot flashes. We tested whether physiologically assessed hot flashes were associated with poorer endothelial function. We also considered whether age modified associations. METHODS: Two hundred seventy-two nonsmoking women reporting either daily hot flashes or no hot flashes, aged 40 to 60 years, and free of clinical cardiovascular disease, underwent ambulatory physiologic hot flash and diary hot flash monitoring; a blood draw; and ultrasound measurement of brachial artery flow-mediated dilation to assess endothelial function...
April 10, 2017: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/28390180/valve-mediated-hemodynamics-and-their-association-with-distal-ascending-aortic-diameter-in-bicuspid-aortic-valve-subjects
#17
Vrishank Raghav, Alex J Barker, Daniel Mangiameli, Lucia Mirabella, Michael Markl, Ajit P Yoganathan
PURPOSE: Valve mediated hemodynamics have been postulated to contribute to pathology of the ascending aorta (AAo). The objective of this study is to assess the association of aortic valve morphology and hemodynamics with downstream AAo size in subjects with bicuspid aortic valve (BAV) disease. MATERIALS AND METHODS: Four-dimensional flow MRI at 1.5 or 3 Tesla was used to evaluate the hemodynamics in the proximal AAo of 52 subjects: size-matched controls with tricuspid aortic valves (n = 24, mid ascending aorta [MAA] diameter = 38...
April 8, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28390060/chronic-heat-exposure-for-health-and-exercise-performance-cardiovascular-research-heats-up
#18
Kyle M A Thompson, Alexandra M Coates, Anthony V Incognito, Alanna K Whinton
Flow-mediated dilation (FMD) is a method used to measure endothelial-dependent vasodilation, quantified by the change in conduit artery luminal diameter during post-occlusive hyperemia This article is protected by copyright. All rights reserved.
April 8, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28389602/shear-mediated-dilation-of-the-internal-carotid-artery-occurs-independent-of-hypercapnia
#19
Ryan L Hoiland, Kurt Jason Smith, Howard H Carter, Nia C S Lewis, Michael M Tymko, Kevin W Wildfong, Anthony R Bain, Daniel J Green, Philip N Ainslie
Evidence for shear stress as a regulator of carotid artery dilation in response to increased arterial carbon dioxide was recently demonstrated in humans during sustained elevations in CO2 (hypercapnia); however, the relative contributions of CO2 and shear stress to this response remains unclear. We examined the hypothesis that, following a 30-second transient increase in arterial CO2 tension and consequent increase in internal carotid artery shear stress, internal carotid artery diameter would increase, indicating shear-mediated dilation, in the absence of concurrent hypercapnia...
April 7, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28386556/effects-of-high-intensity-interval-training-on-aerobic-capacity-in-cardiac-patients-a-systematic-review-with-meta-analysis
#20
Bin Xie, Xianfeng Yan, Xiangna Cai, Jilin Li
Purpose. The aim of this study was to compare the effects of high-intensity interval training (INTERVAL) and moderate-intensity continuous training (CONTINUOUS) on aerobic capacity in cardiac patients. Methods. A meta-analysis identified by searching the PubMed, Cochrane Library, EMBASE, and Web of Science databases from inception through December 2016 compared the effects of INTERVAL and CONTINUOUS among cardiac patients. Results. Twenty-one studies involving 736 participants with cardiac diseases were included...
2017: BioMed Research International
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