View clinical trials related to Vasodilation.
Filter by:The objectives of this clinical trial are to 1) determine the effect of the TP compared to placebo on blood flow and platelet aggregation, 2) to determine the effect of the TP on cardiovascular health compared to a placebo and 3) to assess the safety and tolerability of the TP in healthy adults.
The goal of this randomized, double-blind, placebo-controlled, cross-over trial is to investigate the effects of beetroot-derived betalains on cardiovascular health, sleep and quality of life in healthy middle-aged individuals. The main question[s] it aims to answer are: - Do betalains improve vascular function? - Do betalains improve sleep? - Do betalains improve quality of life? Participants will be involved with the following: - Consuming a daily betalain-rich or placebo capsule for a month - Non-invasive cardiovascular measurements - Wearing a fitness tracker for tracking physical activity and sleep - Answering questionnaires regarding quality of life Researchers will compare results between the intervention versus the placebo group to see if any of the study outcomes are significantly different.
The main purpose of this interventional study is to examine differences in resting blood pressure control between healthy males and females. The main questions it aims to answer are: 1. Are there sex differences in the communication between the sympathetic nervous system (also known as the "fight or flight" response) and peripheral blood vessels (which influence systemic blood pressure)? 2. What is the role of specific vascular receptors that respond to sympathetic signals, and is it different between males and females? Participants will complete one study visit of approximately 3 hours where they will: - Have a blood sample taken to measure circulating sex hormone and sympathetic transmitters. - Receive very small doses of medications commonly used to adjust blood pressure through an artery in their arm. The effects of these medications will be short-acting and localized to the forearm. - Have their sympathetic nervous activity directly measured through two very small needles (similar to acupuncture needles) in the side of their leg. - Have their blood pressure and heart rate recorded, and forearm blood flow measured using ultrasound.
This study has two phases: Phase 1 is to examine blood pressure, microvascular function, and sympathetic nerve activity in mid-life adult binge drinkers vs. alcohol abstainers/moderate drinkers. Phase 2 is to examine the effect of 8-week aerobic exercise training on blood pressure, microvascular function, and sympathetic nerve activity in mid-life adult binge drinkers
The purpose of this project is to identify sex-related differences in the effect of hypoxia on sympathetic vascular transduction.
The purpose of this project is to examine key mechanisms contributing to sex-differences in hypoxic vasodilation and the impact of obesity, with particular emphasis on the sympathetic nervous system.
The purpose of this project is to examine the impact of increases in brain insulin on sympathetic nervous system activity, as well as peripheral and cerebral blood flow in humans.
Patients with sleep apnea are at increased risk of developing cardiovascular disease - with women at potentially greater risk than men. Contributing mechanisms are not well understood, but may be related to how women respond to low oxygen and, given over 70% of patients with sleep apnea are obese, the impact of obesity. This project seeks to increase our understanding of mechanisms that may contribute to sex differences in the cardiovascular response to low oxygen with the hope that this knowledge will improve the efficacy of current therapies and support the discovery of novel therapeutics.
The purpose of this study is to identify the impact of estradiol (E2) on the mechanisms that regulate vascular endothelial function in peri-menopausal (PERI) women. This study is the first step in understanding factors contributing to endothelial dysfunction in women with advancing reproductive age and in response to E2 administration.
Subjects with a known diagnosis of peripheral artery disease as measured by an abnormal ankle brachial index (<.9 or >1.1) will undergo a single 5 min exposure of 670 nm light, 1 cm above the gastrocnemius muscle. Blood flow will be measured by infusion of ultrasound contrast and subsequent acquisition of ultrasound images. 2 blood samples will be collected for measurement of nitric oxide metabolites.