All Clinical Trials

Peripheral arterial disease (PAD) is a highly prevalent and costly condition. Intermittent claudication (IC), defined as ischemic leg pain that occurs with walking, results in functional impairment, reduced daily physical activity, and a lower quality of life. Although the mechanisms contributing to functional impairment are not fully delineated, current evidence suggests that the uncoupling of skeletal muscle cellular metabolism from tissue perfusion may be responsible for exercise intolerance. We have previously shown increases in plasma inorganic nitrite, via oral nitrate, produced clinically significant increases exercise performance in patients with PAD+IC. The hypothesis of this proposal is in patients with PAD+IC, 3-6 days of oral dietary nitrate consumption (in the form of concentrated beetroot juice) will produce a greater tissue perfusion, oxygen delivery, and enhanced muscle metabolism in comparison to placebo. This will translate into an increase in physical performance in both muscle specific plantar flexion exercise and treadmill measures of pain free ambulation. In order to test this hypothesis, we will recruit 10 patients PAD+IC in a randomized, double-blind, placebo controlled, cross over design. Read Less

The purpose of the study is to determine associations between fitness status, bacteria in the mouth, and the blood flow to muscle. This study is trying to find out if fitness status impacts the bacteria that are present in the oral microbiome (environment in the mouth) or the ability of the body to send blood to the skeletal muscle. Participants will complete all or some of the following: A mouth swab to assess the bacteria in their mouths. Produce a saliva sample into a tube. Cycle on a bike until you reach maximum effort. Undergo blood draws Wear a 24-hour non-invasive device that monitors blood pressure. Undergo a test to assess blood flow to the muscles measured with an ultrasound. Drink 70mL (1/3 of a cup) of concentrated beetroot juice once Read Less

Regional anesthesia for hip fractures has been shown to decrease rates of delirium in elderly patients with hip fractures as well as improve pain compared to systemic opioids. The Pericapsular Nerve Group (PENG) block has recently received attention as an alternative approach to femoral nerve block and Fascia Iliaca Compartment Block (FICB). The investigators seek to evaluate if there is a difference between the PENG and FICB in terms of efficacy of pain control in ED patients presenting with hip fracture. We hypothesize that the PENG block may be superior based on previous research. Read Less

As the US population ages, the prevalence of dementia is increasing, and Alzheimer's Disease (AD) is the most prevalent one. Solving the Alzheimer's Disease (AD) epidemic is likely to require preventive therapy beginning many years before symptoms are expected to be evident in at-risk individuals. AD is caused by the dysfunction, loss of synapses, and eventual neuronal death, which may occur up to 25 years before clinical symptoms appear. This study, based off of pre-clinical data, seeks to assess whether it is feasible to use memantine hydrochloride for the prevention of Alzheimer's Disease. Read Less

To the investigator's knowledge, there are no data available in the current literature regarding the acute effects of postprandial hyperglycemia and insulin timing on myocardial perfusion in people with type 1 diabetes (T1D). Observational studies using CEU in type 2 diabetes demonstrate that postprandial hyperglycemia determines myocardial perfusion defects. The investigator hypothesizes that the combination of postprandial hyperglycemia and insulin increases pulse wave velocity (i.e., aortic stiffness) and myocardial vasoconstriction, thereby reducing myocardial perfusion in T1D when compared to healthy controls. Furthermore, the investigator hypothesizes in T1D that dosing insulin before meal intake will ameliorate these cardiovascular defects. Read Less

Often when people with asthma get a virus caused by the common cold (rhinovirus), they also experience an increase or worsening of their asthma symptoms. The purpose of this study is to see if the study medication dupilumab helps prevent those with mild to moderate asthma from having increased asthma symptoms, after being exposed to an experimental rhinovirus inoculation. This is a study about dupilumab which is a drug approved by the U.S. Food and Drug Administration (FDA) for treatment of moderate to severe asthma. Dupilumab is a medication that blocks pathways that cause asthmatic inflammation in the lungs, leading to symptoms and worsening lung function. During this study, subjects will be given either dupilumab or placebo and will subsequently be exposed to the the "common" cold virus (rhinovirus). The virus that the investigators are using has been safely used before in many studies like this involving thousands of volunteers, and the safe use of the virus in this research study has been reviewed by the FDA. The investigators will track asthma symptoms during the study with lung function tests, questionnaires, specimen collection, biomarkers, and physical exams. For data analysis the investigators will assess the samples collected to determine changes in the treatment groups. The investigators will also asses the symptom scores and deviations from baseline measures for lung function. Read Less

Hypothesis: The investigators hypothesize that in patients with CRSwNP who demonstrate sinus colonization with staphylococcus aureus, the administration of dupilumab will be associated with decreased staph colonization and an increase in microbial diversity. Primary Objective will be to demonstrate that dupilumab reduces staphylococcus aureus (phyla firmicutes) abundance while increasing microbial diversity in patients with CRSwNPs who are culture positive for staph aureus at enrollment. Secondary Objectives will be to correlate reduction in Staph aureus abundance and improved bacterial diversity with increased expression of anti-microbial proteins (ß-defensins1-4) and cathelicidin LL-37. In addition, the investigators will correlate improvements in microbial diversity/decreased staph abundance with clinical improvements as assessed via questionnaires and objective/subjective smell function and also as improvements in cellular/immune T2 inflammation as assessed by reduced expression of T2 cytokines/chemokines and eosinophil/eosinophil-derived proteins. Read Less

Since 2019, the HPV working group of the University of Virginia Cancer Center's Southwest Virginia Community Advisory Board has developed and executed strategies to increase regional HPV vaccination rates. Members collaboratively developed Appalachian Voices for Health, a multi-level media production and social marketing intervention. This novel intervention builds on the past efforts of the working group and the engaged organizations; takes into account the impact of vaccine hesitancy on HPV vaccination uptake; and incorporates best practices. Through the intervention, Nursing and Dental Assistant students from Mountain Empire Community College will develop PSAs after receiving training about HPV vaccination and health communication. These PSAs will be used in a social marketing campaign executed through a regional transportation system managed by Mountain Empire Older Citizens. Specifically, the trial's aims are three-fold: assess the intervention's impact on community members' and students' HPV vaccine hesitancy (Aim 1) and perceptions and actions related to HPV vaccination (Aim 2) and evaluate other feasibility indicators at the community-, student-, organizational-, and process levels (Aim 3). The research team will use a concurrent mix-methods approach to assess feasibility indicators. Aims will be assessed using surveys, focus groups, meeting minutes, and implementation records. Data will be analyzed using descriptive and inferential statistics and content coding. Determination of the intervention's feasibility will consider the achievement benchmarks for feasibility indicators individually and collectively. Data will be used to inform refinement and future testing of Appalachian Voices for Health. Read Less

The COVID-19 pandemic severely impacted the medical system both directly but also through incomplete recovery from the virus in the form of post-acute sequelae of COVID-19 (PASC). PASC affects at least 9.6 million individuals as of May 2022 and continues to affect many more. PASC is a multisystem disorder often presenting with mental fog, dyspnea on exertion, and fatigue among other symptoms. The etiology of PASC is uncertain but theories include direct cytotoxicity, dysregulated immune responses, endotheliitis associated with microthrombi, eNOS uncoupling, and myocardial fibrosis with impaired ventricular compliance. To date, there are no established treatments. Exercise has the potential as a therapeutic option to improve VO2peak and improve each of the aforementioned underlying etiologies. The investigators plan to examine the effect of High-Intensity Interval Training (HIIT) and Moderate intensity exercise training (MOD) on the symptoms and exercise tolerance of patients with PASC. The investigators approach will consist of a randomized, blinded, 2-arm, parallel-group design. Enrolled subjects will be randomly assigned to one of two groups in a 1:1 allocation ratio. All groups will undergo a 4-week intervention of 3 days of HIIT per week and 2 days of MOD per week or control of light stretching and controlled breathing. Subjects will be assessed before and after the 4-week intervention to examine the extent to which 4 weeks of the HIIT and MOD combination improves VO2peak and left ventricular diastolic function, global longitudinal strain (GLS), and global circumferential strain (GCS). Further, the investigators will explore changes in markers such as heart rate, heart rhythm, blood pressure, quality of life, exercise tolerance, and PASC symptoms as well as blood/serum markers. Read Less

The objectives of this study are to pilot test a protocol of weekly assessments of motivation to quit and other relevant constructs combined with information about how to enroll in cessation programs, which will allow initial quantification of motivation to quit during cancer treatment and develop hypotheses about the impact of motivation on the decision to enroll in services. Read Less

This study involves collecting exhaled breath containing hundreds of volatile organic compounds (VOCs) that are present in very low quantity (parts per billion). VOCs in the exhaled gase carry information to indicate individual's risk for Postoperative Delirium and its severity. Our long-term objectives are to identify breathomic patterns for prediction, early detection, and stratification of POD during pre- and post-operative phases. Read Less

The overall goal of this project is to collect initial human data on the effects of novel compounds on safety (interactions with an opioid drug, e.g., buprenorphine) and early efficacy signals (subjective effects on negative affect, craving, and opioid withdrawal) in OUD subjects currently in MOUD treatment with buprenorphine. Read Less