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Flow mediated dilation

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https://www.readbyqxmd.com/read/29785503/prolonged-forearm-ischemia-attenuates-endothelium-dependent-vasodilatation-and-plasma-nitric-oxide-metabolites-in-overweight-middle-aged-men
#1
Zainie Aboo Bakkar, Jonathan Fulford, Phillip E Gates, Sarah R Jackman, Andrew M Jones, Bert Bond, Joanna L Bowtell
PURPOSE: Repeated cycles of endothelial ischemia-reperfusion injury and the resulting respiratory burst contribute to the irreversible pathophysiology of vascular diseases, and yet, the effects of ischemia reperfusion on vascular function, oxidative stress, and nitric oxide (NO) bioavailability have not been assessed simultaneously. Therefore, this study sought to examine the effects of prolonged forearm occlusion and subsequent reperfusion on NO-dependent brachial artery endothelial function...
May 21, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29777228/effects-of-clomiphene-citrate-on-male-obesity-associated-hypogonadism-a-randomized-double-blind-placebo-controlled-study
#2
Andressa Heimbecher Soares, Nidia Celeste Horie, Lucas Augusto Piccinin Chiang, Bruno Caramelli, Mariana Gomes Matheus, Alexandre Holthausen Campos, Luciana Cavalheiro Marti, Fernanda Agostini Rocha, Marcio C Mancini, Elaine Maria Frade Costa, Cintia Cercato
BACKGROUND: Obesity causes secondary hypogonadism (HG) in men. Standard testosterone (T) replacement therapy improves metabolic parameters but leads to infertility. OBJECTIVE: To evaluate clomiphene citrate (CC) treatment of adult men with male obesity-associated secondary hypogonadism (MOSH). DESIGN: Single-center, randomized, double-blind, placebo-controlled trial. PARTICIPANTS: Seventy-eight men aged 36.5 ± 7...
May 17, 2018: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29773079/effects-of-linagliptin-on-endothelial-function-and-postprandial-lipids-in-coronary-artery-disease-patients-with-early-diabetes-a-randomized-placebo-controlled-double-blind-trial
#3
Norbert J Tripolt, Felix Aberer, Regina Riedl, Jasmin Url, Gudrun Dimsity, Andreas Meinitzer, Tatjana Stojakovic, Faisal Aziz, Ronald Hödl, Gabriele Brachtl, Dirk Strunk, Marianne Brodmann, Franz Hafner, Harald Sourij
BACKGROUND: Early glucose lowering intervention in subjects with type 2 diabetes mellitus was demonstrated to be beneficial in terms of micro- and macrovascular risk reduction. However, most of currently ongoing cardiovascular outcome trials are performed in subjects with manifest atherosclerosis and long-standing diabetes. Therefore, the aim of this study is to investigate the effects of the dipeptidylpeptidase-4 inhibitor linagliptin in subjects with coronary artery disease (CAD) but early type 2 diabetes mellitus (T2DM) on a set of cardiovascular surrogate measurements...
May 17, 2018: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29770748/the-effect-of-switching-protease-inhibitors-to-raltegravir-on-endothelial-function-in-hiv-infected-patients
#4
Maaike Krikke, Kiki Tesselaar, Guido E L van den Berk, Sigrid A Otto, Laura H Freriks, Steven F L van Lelyveld, Frank J L Visseren, Andy I M Hoepelman, Joop E Arends
Objective Lipid management is one of the cornerstones of cardiovascular risk reduction. Treatment of HIV infection with protease inhibitors (PIs) may cause dyslipidaemia, whilst the integrase inhibitor raltegravir (RAL) has a relatively favorable effect on plasma lipids. We examined the effect of switching from PIs to RAL on endothelial function, and its effect on immunological and inflammatory parameters. Methods We performed a 16-week open-label prospective crossover study: 8 weeks intervention (switch PIs to RAL) and 8 weeks control (unchanged cART regimen)...
April 2018: HIV Clinical Trials
https://www.readbyqxmd.com/read/29766604/sodium-nitroglycerin-induces-middle-cerebral-artery-vasodilation-in-young-healthy-adults
#5
Jenna M Schulz, Baraa K Al-Khazraji, J Kevin Shoemaker
Recent evidence indicates that basal cerebral conduit vessels dilate with hypercapnia, with a nitric oxide (NO) mechanism explaining one way in which parenchymal cerebral arterioles dilate. However, whether NO affects basal cerebral artery dilation remains unknown. This study quantified the effect of an exogenous NO donor [sodium nitroglycerin (NTG); 0.4 mg sublingual spray] on the right middle cerebral artery (rMCA) cross-sectional area (CSA), blood velocity and overall blood flow. Measures of vessel CSA (7 Tesla magnetic resonance imaging) and MCA blood velocity (transcranial Doppler ultrasound) were made at baseline (BL), and following exogenous NTG or placebo (PLO) administration in young, healthy individuals (n = 10, 2 males, age range 20-23 years)...
May 15, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29760721/decreased-count-and-dysfunction-of-circulating-epcs-in-postmenopausal-hypercholesterolemic-females-via-reducing-no-production
#6
Ying Luo, Quan-Neng Yan, Wan-Zhou Wu, Fan-Yan Luo
Endothelial progenitor cells (EPCs) contribute to the endogenous endothelial repair program during hypercholesterolemia. EPC count and migratory and proliferative capacities remain unchanged in the premenopausal female with hypercholesterolemia. However, the changes of count and activity of circulating EPCs in the hypercholesterolemic postmenopausal females are unknown. Here, we find that the migratory and proliferative capacities of circulating EPCs were decreased in patients with hypercholesterolemia versus normocholesterolemia...
2018: Stem Cells International
https://www.readbyqxmd.com/read/29754863/relationships-of-anxiety-and-depression-with-cardiovascular-health-in-youth-with-normal-weight-to-severe-obesity
#7
Amy C Gross, Alexander M Kaizer, Justin R Ryder, Claudia K Fox, Kyle D Rudser, Donald R Dengel, Aaron S Kelly
OBJECTIVE: To evaluate the relationships of depression and anxiety symptoms with cardiovascular disease (CVD) risk factors and measures of vascular health in youth. Major depressive disorder and bipolar disorder are considered CVD risk factors in youth. STUDY DESIGN: Participants (n = 202) were 8- to 18-year-olds from a cross-sectional study evaluating cardiovascular health across a wide range of body mass index values (normal weight to severe obesity). CVD risk measurement included blood pressure, fasting lipids, glucose, insulin, carotid artery intima-media thickness, compliance and distensibility, brachial artery flow-mediated dilation, carotid-radial artery pulse wave velocity, body fat percentage, and a metabolic syndrome cluster score...
May 10, 2018: Journal of Pediatrics
https://www.readbyqxmd.com/read/29752009/effects-of-omega-3-polyunsaturated-fatty-acids-on-fibrosis-endothelial-function-and-myocardial-performance-in-ischemic-heart-failure-patients
#8
Evangelos Oikonomou, Georgia Vogiatzi, Dimitrios Karlis, Gerasimos Siasos, Christina Chrysohoou, Theodoros Zografos, George Lazaros, Sotirios Tsalamandris, Konstantinos Mourouzis, Georgios Georgiopoulos, Marina Toutouza, Dimitris Tousoulis
BACKGROUND & AIMS: Polyunsaturated fatty acids (PUFAs) may affect the cardiovascular system with a multiplicity of mechanisms. We assessed the effects of omega-3 PUFAs supplements on inflammation, fibrosis, left ventricle performance and endothelial function of ischemic heart failure (HF) patients. METHODS: In this double-blind, placebo controlled, cross-over trial we enrolled 31 patients with ischemic HF, followed by a 6-week wash-out period. Omega-3 PUFAs (2 g daily, 8 weeks) were administered PO in the intervention arm...
May 3, 2018: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29750662/supplemental-carbon-dioxide-stabilizes-the-upper-airway-in-volunteers-anesthetized-with-propofol
#9
Katarina Jennifer Ruscic, Janne Bøgh Stokholm, Johann Patlak, Hao Deng, Jeroen Cedric Peter Simons, Timothy Houle, Jürgen Peters, Matthias Eikermann
BACKGROUND: Propofol impairs upper airway dilator muscle tone and increases upper airway collapsibility. Preclinical studies show that carbon dioxide decreases propofol-mediated respiratory depression. We studied whether elevation of end-tidal carbon dioxide (PETCO2) via carbon dioxide insufflation reverses the airway collapsibility (primary hypothesis) and impaired genioglossus muscle electromyogram that accompany propofol anesthesia. METHODS: We present a prespecified, secondary analysis of previously published experiments in 12 volunteers breathing via a high-flow respiratory circuit used to control upper airway pressure under propofol anesthesia at two levels, with the deep level titrated to suppression of motor response...
May 10, 2018: Anesthesiology
https://www.readbyqxmd.com/read/29747515/endocan-levels-and-endothelial-dysfunction-in-patients-with-sarcoidosis
#10
Gonul Aciksari, Murat Kavas, Adem Atici, Seref Kul, Hayriye Erman, Yusuf Yilmaz, Kenan Demircioglu, Emre Yalcinkaya, Asiye Kanbay, Mustafa Caliskan
A systemic inflammatory reaction is a common feature of both sarcoidosis and atherosclerosis. Endothelial-cell specific molecule 1 (endocan) is a marker of vascular pathology which also shows a correlation with inflammation, endothelial dysfunction, and atherosclerosis. The objective of this study was to evaluate the vascular involvement in sarcoidosis using serum endocan levels and brachial artery flow-mediated dilation (FMD), a marker of endothelial dysfunction. We included 53 patients with sarcoidosis without conventional cardiovascular risk factors and 40 healthy controls...
January 1, 2018: Angiology
https://www.readbyqxmd.com/read/29740345/conduit-artery-diameter-during-exercise-is-enhanced-after-local-but-not-remote-ischemic-preconditioning
#11
Scott Cocking, N T Cable, Mathew G Wilson, Daniel J Green, Dick H J Thijssen, Helen Jones
Introduction: The ability of ischemic preconditioning (IPC) to enhance exercise capacity may be mediated through altering exercise-induced blood flow and/or vascular function. This study investigated the hypothesis that (local) IPC enhances exercise-induced blood flow responses and prevents decreases in vascular function following exercise. Methods: Eighteen healthy, recreationally trained, male participants (mean ± SD : age 32 ± 8 years; BMI 24.2 ± 2.3; blood pressure 122 ± 10/72 ± 8 mmHg; resting HR 58 ± 9 beats min-1 ) received IPC (220 mmHg; 4 × 5-min bilateral arms), REMOTE IPC (220 mmHg; 4 × 5-min bilateral legs), or SHAM (20 mmHg; 4 × 5-min bilateral arms) in a counterbalanced order prior to 30-min of submaximal (25% maximal voluntary contraction) unilateral rhythmic handgrip exercise...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29739239/total-hip-replacement-provokes-endothelial-dysfunction
#12
Peter Poredos, Ana Mavric, Lara Leben, Pavel Poredos, Mateja Kaja Jezovnik
Surgery represents an increased risk of different perioperative complications. Endothelial function (EF) is a key mechanism responsible for cardiovascular homeostasis and is involved in thromboembolic complications. We aimed to follow changes of EF in an early postoperative period in patients undergoing total hip replacement (THR). Endothelial function was assessed noninvasively in 70 consecutive patients who underwent an elective THR under spinal anesthesia. Flow-mediated dilation (FMD) and low flow-mediated constriction capability of the brachial artery, which are indicators of EF were measured before the operation (baseline), 24 hours after the operative procedure, and 5 to 7 days postoperatively...
January 1, 2018: Angiology
https://www.readbyqxmd.com/read/29737476/differential-effects-of-brain-death-on-rat-microcirculation-and-intestinal-inflammation-female-versus-male
#13
Sueli Gomes Ferreira, Roberto Armstrong-Jr, Guilherme Konishi Kudo, Cristiano de Jesus Correia, Sabrina Thalita Dos Reis, Paulina Sannomiya, Ana Cristina Breithaupt-Faloppa, Luiz Felipe Pinho Moreira
Brain death (BD) affects organs by multiple mechanisms related to hemodynamic effects, hormonal changes, and the systemic inflammatory response, which reduce organ function and viability. BD reduces microcirculatory perfusion in rat mesentery; this disturbance is also observed in the pancreas and lungs. Sex hormones can affect microcirculatory function, altering tissue perfusion and influencing the inflammatory process. Here, we present differences between sexes in the microcirculatory alterations generated by BD and in inflammatory infiltrate...
May 8, 2018: Inflammation
https://www.readbyqxmd.com/read/29729072/glycated-hemoglobin-correlates-with-arterial-stiffness-and-endothelial-dysfunction-in-patients-with-resistant-hypertension-and-uncontrolled-diabetes-mellitus
#14
Beatriz Moreno, Ana Paula de Faria, Alessandra Mileni Versuti Ritter, Lara Buonalumi Tacito Yugar, Silvia Elaine Ferreira-Melo, Rivadavio Amorim, Rodrigo Modolo, André Fattori, Juan Carlos Yugar-Toledo, Antonio Coca, Heitor Moreno
This study aimed to evaluate the effects of glycated hemoglobin (HbA1c ) on flow-mediated dilation, intima-media thickness, pulse wave velocity, and left ventricular mass index in patients with resistant hypertension (RHTN) comparing RHTN-controlled diabetes mellitus and RHTN-uncontrolled type 2 diabetes mellitus. Two groups were formed: HbA1c <7.0% (RHTN-controlled diabetes mellitus: n = 98) and HbA1c ≥7.0% (RHTN-uncontrolled diabetes mellitus: n = 122). Intima-media thickness and flow-mediated dilation were measured by high-resolution ultrasound, left ventricular mass index by echocardiography, and arterial stiffness by carotid-femoral pulse wave velocity...
May 5, 2018: Journal of Clinical Hypertension
https://www.readbyqxmd.com/read/29728052/a-new-method-for-the-assessment-of-endothelial-function-with-peripheral-arterial-volume
#15
Daoyuan Si, Lujia Ni, Yunfei Wang, Jinsha Liu, Jining Yang, Ping Yang
BACKGROUND: Currently, many methodological approaches have been developed to assess peripheral endothelial function. However, a development of the noninvasive and automated technique for routinely assessing endothelial function is still required. We evaluated the potential value of a new method to measure peripheral endothelial function with reactive hyperemia peripheral arterial volume (RH-PAV) in patients with chest pain. METHODS: We used a novel oximeter-like probe to detect the peripheral arterial volume (PAV) of the finger and compared it with brachial flow-mediated dilation (FMD) performed in 93 consecutive patients with chest pain...
May 4, 2018: BMC Cardiovascular Disorders
https://www.readbyqxmd.com/read/29727219/brachial-artery-endothelial-function-is-stable-across-a-menstrual-and-oral-contraceptive-pill-cycle-but-lower-in-premenopausal-women-than-age-matched-men
#16
Ninette Shenouda, Stacey E Priest, Vanessa I Rizzuto, Maureen J MacDonald
Sex hormone concentrations differ between men, premenopausal women with natural menstrual cycles (NAT), and premenopausal women using oral contraceptive pills (OCP), as well as across menstrual or OCP phases. This study sought to investigate how differences in sex hormones, particularly estradiol, between men and women and across cycle phases, may influence brachial artery endothelial function. Fifty-three healthy adults (22{plus minus}3 yrs; 20 men, 15 NAT, 18 second, third or fourth generation OCP) underwent assessments of sex hormones and endothelial (flow-mediated dilation test, FMD) and smooth muscle (nitroglycerin test, NTG) function...
May 4, 2018: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/29726077/brachial-artery-endothelial-function-is-unchanged-after-acute-sprint-interval-exercise-in-sedentary-men-and-women
#17
Ninette Shenouda, Lauren E Skelly, Martin J Gibala, Maureen J MacDonald
NEW FINDINGS: What is the central question of this study? What is the acute brachial artery endothelial function response to sprint interval exercise and are there sex-based differences? What is the main finding and its importance? Brachial artery endothelial function did not change in either men or women following an acute session of SIT consisting of 3 × 20-s 'all-out' cycling sprints. Our findings suggest this low-volume protocol may not be sufficient to induce functional changes in the brachial artery of sedentary, but otherwise healthy adults...
May 3, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29720185/exercise-training-and-endothelial-function-in-patients-with-type-2-diabetes-a-meta-analysis
#18
Shanhu Qiu, Xue Cai, Han Yin, Zilin Sun, Martina Zügel, Jürgen Michael Steinacker, Uwe Schumann
BACKGROUND AND AIMS: Exercise training is considered a cornerstone in the management of type 2 diabetes, which is associated with impaired endothelial function. However, the association of exercise training with endothelial function in type 2 diabetes patients has not been fully understood. This meta-analysis aimed to investigate their associations with focus on exercise types. METHODS: Databases were searched up to January 2018 for studies evaluating the influences of exercise training with durations ≥ 8 weeks on endothelial function assessed by flow-mediated dilation (FMD) among type 2 diabetes patients or between type 2 diabetics and non-diabetics...
May 2, 2018: Cardiovascular Diabetology
https://www.readbyqxmd.com/read/29709832/effect-of-magnesium-supplementation-on-endothelial-function-a-systematic-review-and-meta-analysis-of-randomized-controlled-trials
#19
Manije Darooghegi Mofrad, Kurosh Djafarian, Hadis Mozaffari, Sakineh Shab-Bidar
BACKGROUND AND AIMS: Findings of past studies are inconsistent regarding the effects of magnesium (Mg) supplementation on endothelial function (EF). We performed this meta-analysis to examine the effects of magnesium supplementation on flow-mediated dilation (FMD) and carotid intima media thickness (CIMT) as markers of EF. METHODS: Literature searches of English publications in MEDLINE and EMBASE databases were conducted up to November 2017. Results are reported as weighted mean difference (MD) with 95% confidence intervals (CI) using random effects model (DerSimonian-Laird method)...
April 14, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29708829/the-impact-of-testosterone-replacement-therapy-on-glycemic-control-vascular-function-and-components-of-the-metabolic-syndrome-in-obese-hypogonadal-men-with-type-2-diabetes
#20
Kristina Groti, Ivan Žuran, Blaž Antonič, Lidija Foršnarič, Marija Pfeifer
OBJECTIVE: This study set out to assess effects of testosterone replacement therapy (TRT) on parameters of metabolic syndrome and vascular function in obese hypogonadal males with type 2 diabetes mellitus (DM2). STUDY DESIGN: Fifty-five obese hypogonadal diabetic males on oral hypoglycemic treatment were enrolled into this one-year, double-blind, randomized, placebo-controlled clinical study. Group T (n = 28) was treated with testosterone undecanoate (1000 mg i...
April 30, 2018: Aging Male: the Official Journal of the International Society for the Study of the Aging Male
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