Find NHLBI Clinical Trials

Search selected NHLBI-supported clinical trials and observational studies by condition, location, or age group. You can also view the complete list of NHLBI-funded studies at ClinicalTrials.gov.

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Showing 1 - 10 out of 18 results
Recruiting
Indiana
Are you a woman who is postmenopausal or a man older than 65? This study will investigate the effects of oral progesterone for older women and testosterone for older men on QT intervals. QT intervals that are increased by medicine can lead to dangerous heart rhythm problems. Researchers hope to learn more about why this happens and how to deliver safer doses. This study is located in Indianapolis, Indiana.
Adult, Older Adult
Accepting Healthy Volunteers
Recruiting
Tennessee
The study is to investigate that the worsening orthostatic tachycardia and symptoms after glucose ingestion in POTS patients are due to a greater increase in splanchnic venous capacitance and excessive blood pooling during an orthostatic challenge.
Adult
Accepting Healthy Volunteers
Recruiting
Have you had a heart attack, and do you want to help improve strategies for blood transfusion? The study is comparing two strategies for blood transfusions in heart attack patients who have anemia—whether to give a blood transfusion when the hemoglobin level is less than 10 g/dL, or to give blood only when the blood count is below 8 g/dL. To participate in this study, you must be at least 18 years old, have anemia, and be hospitalized for a heart attack. The study is located in New Brunswick, New Jersey.
Adult, Older Adult
Recruiting
New York
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.
Adult, Older Adult
Accepting Healthy Volunteers
Recruiting
Minnesota
Are you a healthy adult who regularly sleeps for 6.5 or fewer hours? This study is examining whether getting enough sleep can lower your risk of high blood pressure. To participate in this study, you must be between 18 and 65 years old, regularly sleep for 6.5 or fewer hours, and be able to adjust your sleep schedule for the study. This study is located in Rochester, Minnesota.
Adult, Older Adult
Accepting Healthy Volunteers
Recruiting
Michigan
The purpose of this project is to test sleep reactivity as an independent cause of Shift Work Disorder (SWD). The primary hypothesis is that those with high sleep reactivity will show persistent SWD symptoms after experimental reduction of circadian misalignment, which will then be mitigated with CBT.
Adult, Older Adult
Recruiting
Massachusetts
Shift work increases the risk for diabetes possibly due to the adverse metabolic effects of circadian misalignment. As shift work is not foreseen to disappear, the development of individually-targeted therapies for metabolic health in these vulnerable shift workers is urgently needed. This research will determine whether our dietary intervention can mitigate the adverse metabolic effects of circadian misalignment, which may help in the design of evidence-based dietary interventions to improve the metabolic health in shift workers.
Adult
Accepting Healthy Volunteers
Recruiting
Iowa
Pennsylvania
West Virginia
This study will leverage state-of-the-art, 24-hour behavior assessment in each trimester of pregnancy and examine associations with adverse pregnancy outcomes to inform guidelines and future interventions designed to improve women's pregnancy and long-term cardiovascular health.
Adult
Accepting Healthy Volunteers
Female