View clinical trials related to Endothelial Dysfunction.
Filter by:With aging, vascular function (VF) declines. Inactivity and sedentary life style have been shown to contribute to the worsening of VF. Furthermore, bed rest, a condition commonly used for the management of many chronic conditions, has been proven to lead to even more deleterious consequences, including VF decline. This study evaluates the effect of passive mobilization of the lower limbs on VF in bedridden oldest-old. Half of the participants will undergo passive mobilization treatment in addition to standard therapies, while the other half will receive only standard therapies. We hypothesize that passive mobilization may improve nitric oxide (NO)-mediated endothelial function.
In healthy young adults 18-39 years of age, the investigators will determine if intermittent inhalation a 0.1% CO, from a 1-liter bag once every minute for 30-40 minutes, at a level that approaches the CO boost with hookah smoking, augments endothelial function, thus implicating CO as the major endothelial vasodilator substance in hookah smoke. Rationale: Our group has demonstrated (PRO36547) that in contrast to cigarette smoking, hookah smoking (tobacco heated with charcoal) acutely augments, rather than impairs, brachial artery FMD. Importantly, our data strongly implicate—but do not prove—that the augmentation in FMD is caused by CO. Therefore; the investigators would like to extend the scientific priority of this work by directly investigating cause and effect of CO breathing (similar levels than ones obtained after hookah smoking) on brachial artery FMD.
Nonalcoholic fatty liver disease (NAFLD) is an emerging health problem as it can lead to end stage liver failure and cardiovascular complications. Diet play an important role in the development of NAFLD. Many studies have addressed the effects of added fructose on NAFLD. To date, little attention has been paid to the effects of a diet devoid of fructose. Therefore, the investigators aim to study the effects of fructose restriction on hepatic fat accumulation and vascular function using a double-blind randomized placebo-controlled design.
Apple polyphenols are mostly acknowledged for their hypoglycaemic properties, but represent an apple active fraction with many pharmacological functions. The study aim was to examine their effect on uricemia and endothelial function in a sample of overweight subjects. This was a two-phases study. The in vitro experiment aimed to evaluate the apple polyphenols' ability to lower uric acid in comparison with allopurinol. The in vivo study consisted in a randomized, double-blind, parallel placebo-controlled clinical trial involving 62 overweight volunteers with suboptimal values of fasting plasma glucose (100 mg/dL≤FPG≤125 mg/dL), randomized to be treated with 300 mg apple polyphenols or placebo for 8 weeks.
The importance of Aldosterone for endothelial function and Insulin resistance observed within patients with type 2 diabetes
Study will enroll patients scheduled for hip arthroplasty. In each subject a flow-mediated dilatation capability (FMD) of the brachial artery will be measured prior to elective surgery, within 24 hours after surgery and 5-7 days after surgery. At each session the brachial artery diameter will be measured at rest, during cuff inflation and 50 seconds after cuff deflation. From above mentioned values the increase in the diameter of the artery during reactive hyperemia will be calculated. Simultaneously with the ultrasound investigations, the blood for determination of the endothelial dysfunction markers will be collected. The participants will be contacted again 3 months after the surgery and asked about the complications which may be associated with the surgery.
This proposal will test the hypothesis that chronic treatment with sildenafil with and without the use of nitric oxide substrate, L-arginine, protects against fatty acid induced impairment of endothelial function, improves insulin-stimulated microvascular recruitment, insulin sensitivity and glucose uptake in CD36 rs3211938 G-allele carriers.
The rising worldwide prevalence of obesity and its subsequently rising incidence of concommitant diseases as diabetes and cardiovascular events impose a defiant obstacle for the health care and associated health care costs of future generations. Obese pregnant women are a growing population of interest because their offspring is at risk for childhood obesity, an adverse metabolic and inflammatory profile and possible endothelial dysfunction. However, strong evidence is still lacking regarding the hypotheses on the early origin of these long-term health consequences. Consequently there is no comprehensive data available on the contribution of changing maternal weight through lifestyle interventions or bariatric surgery and an eventual adverse metabolic and endothelial programming of the offspring. The investigators of this study want to provide additional data on the body composition, metabolic and inflammatory state as well as endothelial function of children of obese pregnant women women and compare the outcome with children born from normal weight women. Furthermore, the investigators of this study will stratify the obese pregnant women into 3 groups: women who did not underwent an intervention, women who underwent a weight changing intervention during pregnancy e.g. diet or lifestyle intervention and women who underwent bariatric surgery before pregnancy. The overall aim of the study is to prove that in all the diverse groups of participating children, except the control group, there will be a certain grade of endothelial dysfunction, even if there was a normalization of weight, insulin sensitivity and inflammation before conception or delivery in the mother.
The purpose of present study was to investigate the effect of 10 weeks of recreational physical activity program on the irisin levels, progenitor endothelial cells and cardiometabolic profile in healthy children. Also, we investigated the correlation between this markers with anthropometric data, body composition, cardiac autonomic balance and physical fitness parameters. We evaluated eighty children aged 6 to 14 participated in the recreational physical activity program by 10 weeks (Duration: 60 minutes; Intensity: 65%-85% heart rate reserve; Frequency: 4 sessions/week). All parameters were evaluated before and after this approach.
The purpose of this study is to determine if different blood flow patterns change artery function. We hypothesize that the temporary induction of an oscillatory blood flow pattern will result in an immediate improvement in artery function. Participants will be asked to come to the Vascular Dynamics Lab (IWC E102) at McMaster University for a total of 3 visits. The first visit will allow the participant to get comfortable with the lab and the upcoming tests; and the next 2 visits will be scheduled at the same time of day to collect data. For visits 2 and 3, participants will be asked to arrive after a 4 hour fast. At these visits, ultrasound imaging will be used to examine the arteries and how they may change when blood flow patterns through an artery in the arm are changed. To change blood flow in the arm, heat, rhythmic squeezing of the forearm with a cuff, or handgrip exercise will be used. These interventions will be applied to the left forearm, from the elbow to the fingertips. A trained technician will also draw a blood sample during both data collection visits. A total of 10 participants will be recruited for the entire study.