Clinical Trials

Has your doctor recommended right heart cardiac catheterization for you? This study is investigating new magnetic resonance imaging (MRI) techniques that use a guidewire to help position a heart catheter within the heart. MRI fluoroscopy shows pictures of the heart so that doctors can watch while they work. Using the guidewire during MRI may improve the procedure of heart catheterization. To participate in this study, you must be at least 18 years old, and your doctor must have recommended right heart catheterization for you. This study is located in Bethesda, Maryland.

Are you an adult who does not have high blood pressure and is interested in research? This study will investigate how the brain regulates the body’s response to stress and how infection with HIV or pre-hypertension affects regulation. Your heart and brain activity will be measured while you are at rest, during a mentally stressful task, and while you feel angry. The study will also test whether a breathing exercise improves regulation. People with and without HIV and pre-hypertension will be included. To participate in this study, you must be between 21 and 65 years old and not have high blood pressure. This study is located in Miami, Florida.

To determine the mechanism of monocyte priming in humans, the study team will conduct a complete feeding trial in normal weight and metabolically healthy human subjects (20-45 years of age) using a western diet (WD), characterized as being high-saturated fat, high-fructose, and high-calorie for 8 weeks.

The Together Everyone Achieve More (TEAM) Physical Activity trial evaluates the efficacy of a group-based social affiliation intervention (vs. a standard group-delivered physical activity comparison program) for increasing physical activity among inactive African American women. Using a group cohort randomized design implemented at community centers across five years, the primary aim of this study is to evaluate the efficacy of the 10-week TEAM-PA group-based intervention (vs. comparison program) on increasing daily total physical activity from baseline to post-intervention and maintenance at a 6-month follow-up.

The study aims to determine the minimally effective dose combination(s) of frequency and duration needed to provide cardiometabolic benefit during an 8-hour experimentation period.

This study will identify and test the physiological effects of several sedentary behavior interruption strategies and explore the feasibility (i.e., likelihood of an individual performing the requested activities) of those strategies to inform the development of public policy surrounding sedentary behavior interruption. Long-term, the findings of this study will inform a large clinical trial that can test whether sedentary behavior reduction can decrease cardiovascular disease risk.

This study aims to evaluate the effect of estradiol with or without a prior gonadotropin releasing hormone analogue on insulin sensitivity and vascular function in transgender females compared to cisgender controls.

The purpose of the study is to evaluate how dietary habits in the post-surgical year impact outcomes of bariatric surgery.

The overarching goal of the proposed study is to develop and test an enrichment to Nurse-Family Partnership (NFP) using an existing, evidence-based program to improve clients' and their children's cardiovascular health from early pregnancy to 24 months postpartum. With support from NFP supervisors and nurses, the investigators will develop new NFP materials promoting healthy diet, activity, sleep, and smoking behaviors, along with optimal weight, glycemia, lipid, and blood pressure profiles. The investigators will conduct a pilot study with 40 prenatal or postpartum NFP clients and their nurses to determine feasibility and acceptability of the materials and study protocol.

Do you have overweight? Circadian rhythm disorders can cause overweight and obesity. This study is examining how not getting enough sleep causes these complications. To participate in this study, you must be between the ages of 20 and 40 and have overweight but not obesity. This study is located in New York, New York.