Clinical Research Directory

The Synergistic Effects of Menopause and HIV on Cardiovascular Disease Risk in Women

Menopause is associated with the acceleration of many comorbidities, including cardiovascular disease. Whether HIV and menopause together increase cardiovascular disease risk is a key knowledge gap. The goal of this observational study is to address this knowledge gap by looking at the role of menopause on cardiovascular disease risk factors such as insulin resistance, hypertension, hyperlipidemia, and carotid atherosclerosis using previously collected data. The investigators will look at underlying causes for cardiovascular diseases worsening in menopausal women with HIV by looking at the role of increased inflammation in the body and whether this is altered by weight. The investigators achieve this by enrolling participants who are willing to undergo a whole body MRI.

Geospatial Analysis of Neighborhood Environmental Stress in Relation to Biological Markers of Cardiovascular Health and Health Behaviors in Women

Background: Heart disease is a leading cause of death in the United States. Healthy diet and exercise improve heart health. Some features of where a person lives can lead to stress and decrease chances for exercise. Researchers want to see how these factors may increase the risk of heart disease in women. Objective: To see if there are differences in stress levels between women who live in different parts of Washington, DC. Also, to see how these women use their neighborhoods for exercise. Eligibility: Healthy white or black females ages 19-45 who live in Washington, DC, who have access to a smartphone Design: Participants may stay at the NIH Clinical Center overnight for a 2-day visit. Visit 1 will include: Physical exam Blood tests Electrocardiogram: Electrodes on the participant s skin will measure heart activity. PET/CT scan: Participants will get an injection. They will lie in a machine that takes pictures of the body. Surveys Body size measurements Nutrition consultation Blood vessel tests: This is measured with blood pressure cuffs, a device placed on the participant s fingertip, and a probe placed on the participant s neck. Resting Energy Expenditure: Participants will breathe under a clear hood for 45 minutes. Participants will be followed for about 2 weeks. They will wear a device on the wrist and carry a GPS device. Through a mobile app, they will answer short daily surveys on stress and exercise. Visit 2- Device return Nutritional consultation

Lions Hearts: A Community Approach to Multigenerational Cardiovascular Disease Risk

This pilot study evaluates the feasibility, acceptability, and preliminary effectiveness of Lion Hearts, a community-based, family-centered physical activity intervention designed to improve cardiovascular health among mother-child dyads. Developed through community co-design, the 12-week intervention is delivered in local CrossFit affiliates and includes twice-weekly fitness sessions incorporating functional movement, goal setting, teamwork, and health education. The study aims to assess changes in physical activity, fitness, and cardiovascular health markers, as well as family dynamics and motivation for physical activity. Participants complete baseline, mid-, post-, and 3-month follow-up assessments, including surveys, fitness testing, accelerometry, and optional lab work. Findings will inform the refinement of the intervention for future large-scale trials.

Effects of an Aerobic Exercise Program on Cardiovascular Risk in Patients With Chronic Kidney Disease or Rheumatoid Arthritis

The goal of this clinical trial is to determine whether an aerobic exercise program can reduce cardiovascular risk in patients with systemic inflammation, such as those with rheumatoid arthritis and chronic kidney disease. The main questions this study aims to address are: * Does an individualized aerobic exercise program reduce cardiovascular risk, as assessed arterial stiffness and endothelial function ? * What are the effects of this exercise program on inflammation and immunosenescence? Researchers will compare an individualized aerobic exercise program with a therapeutic education program (consisting of educational phone calls only) and a control group with no intervention. Participants will: * Perform three physical activity sessions per week for six weeks (45-minute sessions at 60-80% of heart rate reserve); * Attend clinic visits at baseline, after the 6-week intervention, and at a 6-week follow-up after the intervention; * Undergo assessments including pulse wave velocity, hyperemic reactivity, and blood analyses.

Physical Inactivity Among Patients With Cardiovascular Risk

The goal of this clinical trial is to learn if newly developed intervention package works to improve physical activity level among patients with intermediate cardiovascular risk factors. The main questions it aims to answer are: Does the INSPIRE-PA intervention increase the level of physical activity among participants with intermediate cardiovascular risk factors? * What changes occur in physical activity level, BMI and blood pressure following participation in the intervention? * Are there any challenges, barriers, or unintended effects experienced by participants during the intervention period? * Researchers will compare the INSPIRE-PA intervention to usual care to determine whether the empowerment-based strategy is effective in improving physical activity levels and reducing cardiovascular risk among patients attending government primary medical care Iinstitutions. Participants will: * Participate in the INSPIRE-PA program for 6 months * Attend scheduled follow-up visits at the primary medical care institution (e.g., every 2-4 weeks)for counselling, evaluation of physical activity level, and assessment of cardiovascular risk indicators * Engage in structured physical activity as recommended in the intervention package * Record their daily physical activity and any challenges or barriers in a physical activity logbook or diary * Undergo periodic measurements such as blood pressure, weight, waist circumference, and other relevant clinical assessments

Weight Management After Cancer for Survivors in Rural Communities

This study is testing a new program called WeCan-Rural, designed to help breast cancer survivors manage symptoms and build healthy habits like eating well, staying active, and managing their weight. These changes may help lower the risk of heart disease after cancer treatment. The study will answer two main questions: * Can we successfully recruit and keep participants in the study, and will they find the program helpful and easy to follow? * Will people who join the program see better results in areas like weight, symptoms, diet, physical activity, and confidence in managing their health compared to those who receive standard care? Here's what participants will do: * Visit their clinic twice (about 12 weeks apart) to be weighed, have their blood pressure checked, give a blood sample, and complete a short walking test * Fill out online surveys about their health, diet, physical activity, symptoms, and confidence in managing their health * Be randomly assigned (like flipping a coin) to either receive the WeCan-Rural program or standard health information * If assigned to the program, attend 12 weekly one-hour video sessions on Zoom with a trained therapist

Prospective Evaluation of New Metrics to Assess Cardiovascular Remodeling in Obstructive Sleep Apnea

The goal of this prospective study is to gain insight into the endophenotypic variation in OSA, with a focus on the underlying pathophysiological traits and the cardiovascular alterations associated with the condition. To capture the variability in OSA endophenotypes, novel metrics that extend beyond the AHI will be considered, with particular attention to the sleep-apnea-specific hypoxic burden, the sleep-apnea-specific heart rate response, and pulse wave amplitude drops (PWADs). Since the impact of treatment on cardiovascular parameters remains an important point of interest, the effects of different treatment modalities on cardiovascular changes will be investigated, including continuous positive airway pressure (CPAP), mandibular advancement devices (MADs), and hypoglossal nerve stimulation.

The Effect of Water Physical Exercise Program in Thermal Water and Hydropinotherapy on Cardiovascular Health

The goal of this randomized four-arm clinical trial is to determine the effect of 16-week water physical exercise program in thermal water and hydroponotherapy on lipide profile in middle-aged and elderly people, with controlled health conditions. Participants will be randomizate into four arms: * Arm I: Control * Arm II: Water Physical Exercise Program (WPEP) in thermal water * Arm III: Hydropinotherapy with thermal water combined with bay leaf (L. nobilis) * Arm IV: WPEP in thermal water and hydropinotherapy with thermal water combined with bay leaf (L. nobilis) Primary outcome: 1. Lipid profile (cholesterol total, low-density lipoprotein cholesterol (c-LDL), high-density lipoprotein cholesterol (c-HDL), triglycerides) Secondary parameters: 2. Inflammatory biomarkers: interleukin-6 (IL-6), C-reactive protein (CRP) 3. Glucose metabolisc: fasting plasma glucose, insulin, Hemoglobin A1c (HbA1c) 4. Aspartate transaminase (AST), alanine transaminase (ALT), alkaline phosphatase, bilirubin, creatinine. 5. Anthropometric and clinical variables: weight, waist to hip ratio, body composition and bone mineral density 6. Systolic and diastolic blood pressure 7. Physical function 8. Lifestyle parameters: sleep quality, quality of life and eating habits

Coronary Computed Tomography Angiography In Rheumatoid Arthritis Study

The Coronary Computed Tomography Angiography in Rheumatoid Arthritis study is part of the multinational, prospective, observational Autoimmunity and Atherosclerosis in Rheumatic Diseases cohort (https://atacc-rd.com) that includes comprehensive baseline and follow-up assessments at 3, 5, and 10 years. It comprises a main protocol and several optional modules, including a Cardiac Imaging Module, Biobanking Module, Pulmonary Module, and Anxiety and Depression Module. The study aims to advance understanding of cardiopulmonary and psychological comorbidities in rheumatoid arthritis, to improve early identification and management, and to enhance insights into underlying disease mechanisms-ultimately refining risk stratification and targeted prevention strategies. The study includes 4,000 patients with rheumatoid arthritis enrolled through the Cardiac Imaging Module in the main protocol. Participants undergo coronary computed tomography angiography, pulmonary function testing, physical examination, questionnaires, and biobanking, supplemented by genetic, proteomic, metabolomic, and microbiome profiling.

Effects of Sweetener Consumption on Risk Factors for Heart Disease in Prediabetic Subjects

The aim of this prospective interventional study is to investigate the metabolic effects of consuming artificial and natural sweeteners in persons with prediabetes. Prediabetes is a condition characterized by blood sugar levels that are elevated above normal but not yet meeting the criteria for type 2 diabetes. This condition markedly increases the risk of progressing to type 2 diabetes, which in turn can lead to complications including cardiovascular diseases. Artificial sweeteners such as saccharin and sucralose, as well as natural sugar substitutes like erythritol, are increasingly used as alternatives to sugar and are recommended for individuals at cardiometabolic risk - including overweight individuals, patients with prediabetes, or diabetics - to help reduce caloric intake. Recent literature has reported possible negative associations between artificial sweeteners and blood sugar regulation in healthy subjects (1). Additionally, effects on various blood cells have been observed. For example, erythritol has been shown to alter platelet function leading to increased reactivity in healthy study participants following consumption (2). However, the impact of alternative sweeteners on metabolic processes and their effects on blood coagulation in patients with prediabetes-a population at increased risk-has not been systematically studied. In this planned interventional study, 80 patients meeting laboratory criteria for prediabetes will be randomly assigned to one of four groups, each receiving a different intervention for two weeks: saccharin, sucralose, erythritol, or a control group receiving water. The doses reflect the acceptable daily intake or known doses that are considered safe. After enrollment, participants will visit the study center 2 times: before starting the intervention and after completing the intervention. During these visits, biological samples such as blood, urine, and stool will be collected to study metabolism, gut bacteria, immune and blood cell function. Tests will include an oral glucose tolerance test, coagulation tests, and additional blood analyses. Additionally, participants will wear a glucose monitor to track blood sugar fluctuations during the intervention. The investigators hypothesize that consumption of alternative sweeteners negatively affects blood sugar regulation and insulin sensitivity in patients with prediabetes. Furthermore, this study will explore how the candidate sweeteners influence the gut microbiome, blood cells and other metabolic factors in this population.

Cardiovascular Risk Assessment in Young Women After Index Pregnancy With and Without Placental Complications

In this project, the investigators aim to study how all these factors determine the cardiovascular status of a total of 1,800 mothers, 3 to 6 years after delivery. In addition, the investigators want to assess whether lifestyle and living conditions after childbirth may improve or worsen this imprint, since women often prioritize their families over themselves, making it more difficult to maintain a healthy lifestyle that could reduce their cardiovascular risk. Furthermore, the investigators will evaluate how environmental exposures influence their health, as well as explore potential strategies for prediction and prevention. The goal is to develop an easy-to-use algorithm or test that allows women and their physicians to assess this risk, ideally in the form of a mobile app. Although predictive algorithms for cardiovascular health already exist, most have been developed using predominantly male or older populations, and none have taken into account pregnancy-related events or environmental exposure - both of which are key determinants of women's cardiovascular health.

Proactive Telemedicine to Improve Healthcare Access and Prevention in Rural Primary Care (PTM)

The study evaluates whether Proactive Telemedicine (PTM) can improve healthcare access for individuals who have not contacted their primary care team for at least one year, compared with face-to-face visits. PTM consists of brief, remote behavioral interventions addressing modifiable risk factors such as tobacco use, alcohol consumption (AUDIT-C: Alcohol Use Disorders Identification Test - Consumption), physical activity (IPAQ: International Physical Activity Questionnaire), and Mediterranean diet adherence (PREDIMED: Prevención con Dieta Mediterránea). PTM follows national preventive protocols including PAPPS (Programa de Actividades Preventivas y de Promoción de la Salud) and uses validated tools such as EuroQol-5D-5L (EQ-5D-5L) to measure healthcare accessibility and quality-of-life outcomes. This randomized non-inferiority trial aims to determine whether PTM is as effective and safe as traditional in-person consultations.

Exploring Sustainable Alternatives to Marine Oils With Echium and Ahiflower Oils

This randomized, single-blind, crossover clinical trial aims to evaluate Echium oil and Ahiflower® oil as sustainable, plant-based alternatives to marine oils for omega-3 supplementation. Although fish oil is the primary dietary source of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), its use as a dietary supplementation presents several drawbacks, including high cost, potential contamination, limited global supply, and sustainability concerns. Echium and Ahiflower oils are naturally rich in stearidonic acid (SDA), a metabolic intermediate that bypasses the rate-limiting Δ6-desaturase step in the omega-3 pathway, potentially enhancing the conversion to EPA. Fifteen participants will undergo three 8-week intervention phases-Echium oil (15 g/day), Ahiflower oil (15 g/day), or EPA capsules (2.34 g/day)-separated by four-week washout periods. Blood samples will be collected before and after each phase to measure fatty acid profiles in plasma, plasma fractions, and erythrocytes using GC-MS. Anthropometric and biochemical parameters will also be assessed. The study seeks to determine whether SDA-rich plant oils can effectively increase EPA levels in humans and potentially reduce the reliance on marine oils for cardiovascular health benefits.

Diet and Cardiometabolism in Rosario

The DiCaMeR study is an observational, cross-sectional study aimed at evaluating the relationship between dietary patterns and cardiometabolic health in adults. The study includes adults following vegan, vegetarian, and omnivorous diets residing in Rosario, Argentina. Participants undergo comprehensive assessments including dietary intake, anthropometric measurements, body composition, blood pressure, grip strenght, and laboratory biomarkers related to cardiovascular and metabolic health. The main objective is to compare diet characteristics and cardiometabolic risk profiles across different dietary patterns, providing insights into the potential health benefits and risks associated with each dietary pattern.

Identification of Asymptomatic Patients at Very High Cardiovascular Risk: Contribution of a Strategy Based on Carotid and Coronary Explorations, Compared to Simple Risk Calculation Using the European "SCORE 2" Algorithm. (IDEA-CVR)

To prevent myocardial infarction ( MI), coronary atheroma development by LDL-cholesterol deposition in the arterial wall is the basis. Since atheromatous plaques develop slowly before becoming symptomatic, their early detection in asymptomatic patients and the implementation of an effective strategy to prevent their progression constitute the most promising primary prevention strategy. In younger subjects, the main modifiable pro-atheromatous factors are smoking and an excessively high LDL-C level, partly genetically predetermined, but also favored by a diet too rich in saturated fats and a lack of physical activity. In the French national MI registry, the average age of patients is 62 years (Arch Cardiovasc Dis 2021 Oct;114(10):647-655). Half of MIs therefore occur at working age due to rupture of atheromatous plaques, which had developed during the months/years preceding the acute event. According to the latest recommendations of the European Society of Cardiology (ESC) on CV prevention published in August 2021, the visualization of coronary or carotid atheromatous plaques justifies considering the patient as having atherosclerotic cardiovascular disease (ASCVD), and automatically places them in the "very high CV risk" category, with an LDL-cholesterol target of \<0.55 g/L. However, these recommendations do not clearly define the criteria justifying the use of imaging in asymptomatic patients. In current practice, CV risk stratification for asymptomatic patients with no prior CV disease is currently based on risk calculation using the European "SCORE 2" algorithm, available online. It allows the calculation of the absolute risk in % of occurrence of a fatal or non-fatal CV event (myocardial infarction, stroke) over 10 years. The main objective of this study is to describe patients reclassified as "very high CV risk" following the detection of atheroma plaques formed in relation to their risk level estimated by SCORE2.

Multimorbidity and Cardiovascular Risk Factors After Renal Transplant

Who can participate? Any adults over the age of 18 who have received a kidney transplant at the research centre are eligible for recruitment within the first month after transplant What does the study involve? The study involves observing and gathering data to understand how the health of people who receive a kidney transplant changes over the first year. In particular the investigators are interested in the risk factors for heart disease and stroke, and how these change over the first year of transplant. The investigators are also interested in multiple health conditions, and how these impact patients after transplant. There are no interventions but there will be measurements of diagnoses, risk factors for heart disease and stroke, and assessments of physical fitness Blood pressure, BMI, routine blood tests as well as assessing muscle and fat changes, how fit patients are and what new health conditions they have. What are the possible benefits and risks of participating? There is no active treatment or intervention, so there are no risks of benefits compared to normal care. Where is the study run from? University Hospitals of Derby and Burton NHS trust, at the Royal Derby hospital Renal Department. When is the study starting and how long is it expected to run for? The study is expected to start 1/9/2025 and run for 2 years. Who is funding the study? The only costs of the study are funding for the staff member running the study, who is funded by the NIHR as an academic research fellow Who is the main contact? Dr Samuel Strain, Samuel.strain@nottingham.ac.uk

Improving the Heart Health of Home Health Aides

The goal of this early-stage study is to support the heart health of home health aides, a workforce that provides care for adults at home but whose own health has been historically poor. To do this, the study will use Life's Essential 8 (LE8), a program developed by the American Heart Association (AHA) that promotes cardiovascular wellness through education and lifestyle changes. The program has been adapted specifically for home health aides and will be delivered by trained "peer coaches," who are fellow home health aides who will help guide participants through the program. The main questions the study aims to answer are: * Will the LE8 intervention, which provides cardiovascular health education and support with positive thinking, be used by home health aides and do they like it? * Does the LE8 intervention actually improve home health aides' cardiovascular health after the intervention's conclusion compared to baseline? Participants will be paired with a trained peer coach and take part in the 10-week program over the course of 6 months. The program includes support for healthy behaviors and positive thinking, with the goal of making lasting improvements in cardiovascular health.

Cardiovascular Health of Transgender Individuals During the Gender-affirming Pathway

Gender incongruence, now classified in ICD-11 as a "marked and persistent incongruence between an individual's experienced gender and the gender assigned at birth," is managed in dedicated, multidisciplinary centres that coordinate psychological support with medical-surgical care. Gender-affirming hormone therapy (GAHT) is central to this care pathway. In particular, masculinising GAHT for people assigned female at birth (AFAB) relies mainly on testosterone, and feminising or demasculinising GAHT for people assigned male at birth (AMAB) combines oestradiol with androgen-lowering agents such as cyproterone acetate or GnRH analogues (triptorelin, leuprorelin). In addition, Gender-affirming surgery (GAS) offers further individualised options: "Top" procedures- chest masculinisation for AFAB or breast augmentation for AMAB, and "Bottom" procedures\*\* such as hysterectomy with or without oophorectomy, phalloplasty or metoidioplasty for AFAB; orchiectomy or vaginoplasty for AMAB. Other ancillary interventions include facial feminisation or voice surgery. GAHT aims to suppress endogenous sex-hormone levels and secondary sex characteristics while inducing those consistent with the affirmed gender. Despite its widespread use, cardiovascular (CV) safety data are scant and largely observational. Sex-steroid receptors are ubiquitous in the vasculature and contribute to the sex-dimorphic patterns of CV risk seen in cisgender populations; GAHT is therefore biologically plausible as a modifier of CV outcomes in transgender people, yet robust evidence remains limited. Current literature suggests that AFAB individuals on testosterone exhibit an up to 2.66-fold higher composite CV risk than cisgender AFAB comparators. The most consistent changes are higher blood pressure and lower HDL cholesterol; clinically significant polycythaemia is uncommon and treatable. Instead, AMAB individuals on feminising therapy do not show a clearly increased overall CV risk compared with cisgender AMAB peers, though data are inconsistent. An observational study reported that within four months of GAHT initiation, systolic blood pressure rose by 2.6 mmHg in trans men and fell by 4 mmHg in trans women, with no diastolic change in either group. The current evidence base is weakened by small cohorts, inadequate control groups, and reliance on surrogate biochemical markers rather than hard clinical endpoints. Many studies also overlook GAHT exposure altogether, hampering meaningful interpretation. Moreover, social determinants-mental-health burden, substance use, and healthcare inequities-compound CV risk but are seldom accounted for. Key unanswered questions include the long-term CV effects of GAHT, age-specific interactions with blood pressure and lipids, optimal therapeutic targets, and underlying mechanisms. Addressing these gaps demands rigorously designed, large-scale, prospective studies that actively involve transgender participants. In summary, while GAHT is indispensable for gender affirmation, its cardiovascular implications-especially for AFAB individuals-warrant caution and systematic monitoring. Future evidence should inform tailored protocols that balance gender-affirming benefits against potential CV risks and integrate biomedical parameters with the broader social context impacting transgender health.

LANdiolol to Avoid TAchycardia in Patients at Risk for Cardiovascular Events Undergoing Major Non-cardiac Surgery

Limiting perioperative tachycardia (aiming for a heart rate \<90 beats per minute throughout the perioperative period) using the ultra-short acting beta-blocker landiolol in patients with cardiovascular risk factors undergoing major surgery might lower the incidence of perioperative myocardial injury. Feasibility of the intervention needs to be proven prior to conduction of a larger trial.

The Role of Mobile Apps in Promoting Cardiovascular Health and Motivation to Exercise During Pregnancy

The goal of this study is to determine the effectiveness of a mobile exercise app in improving cardiovascular health and motivation to exercise in pregnant women who are healthy, in their 2nd trimester, between 18-45 years age, and do not do exercise currently. The aims of this study are determine i) the effect of a mobile app (BumptUp) to increase motivation to exercise as assessed by questionnaire, and ii) the changes may occur in cardiovascular health outcomes such as increased percent Flow-Mediated Dilation (FMD), Heart Rate Variability (HRV), and decreased Pulse Wave Velocity (PWV) over an 8-week period of intervention. Researchers will compare this to pregnant women who are healthy, in their 2nd trimester, between 18-45 years age, and who will not be using the mobile app (BumptUp) for exercise. Participants who are in the experimental group will be given access to the mobile app (BumptUp) for 8 weeks. Both the control and experimental group will visit the lab for their baseline measurements (study visit 1), followed by two visits at 4 weeks (study visit 2) and 8 weeks (study visit 3) to have their heart rate variability, arterial stiffness (PWV), and vascular function (FMD) assessed. At each study visit, blood pressure, heart rate, height, and weight will also be measured. Additionally, at all three study visits, participants will fill out a questionnaire to determine motivation to exercise.

The Effect of Physical Activity on Cardiovascular Disease Risk Awareness and Self-Worth in Young Women

The main purpose of this study was to reveal the self-worth perceptions of women who regularly participate in physical activity and to investigate the effect of physical activity on self-worth perception and cardiovascular risk awareness.

Pulses: Optimizing Pulse Consumption for Cardiometabolic Health

This randomized clinical trial aims to evaluate the effects of consuming two different doses of pulses (1.5 cups/week or 3 cups/week) in individuals with baseline intake below 1.5 cups/week, compared to a control group receiving standard nutrition education based on the United States Department of Agriculture's (USDA) My Plate guidelines. The main question the Pulses study aims to answer is: • What is the effect of increasing pulse consumption (in a dose-response manner) on specific cardiometabolic risk factors, including LDL-C, CRP, HBA1C, and blood pressure compared to standard nutrition education? For secondary outcomes, this study aims to answer the following: • Does increased pulse consumption improve the following: overall serum lipid profile (Total cholesterol (TC), HDL-C, Triglycerides (TG), diet quality (measured by the Healthy Eating Index), and participants self-reported satisfaction with life (SWLS) and Satisfaction with Food-related Life (SWFoL). All participants will attend biweekly classes and food demonstrations. The pulses groups will learn to prepare various pulse-based recipes, while the control group will receive guidance on preparing healthy meals following the USDA MyPlate recommendations.