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 11 - 20 out of 28 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
Ohio
Is your child having otolaryngologic surgery with anesthesia? Children with Down syndrome often experience dangerously low heart rates when they receive anesthesia for procedures. This study will look at children who have Down syndrome and children who do not to monitor their heart rate during this type of procedure. Participants in this study must be between 1 and 8 years old. This study is located in Cincinnati, Ohio.
Child
Recruiting
Illinois
New Jersey
Vermont
Are you an adult with heart failure and right bundle branch block (RBBB)? This study will evaluate the effectiveness and benefit of His-bundle-pacing enhanced cardiac resynchronization therapy (His-CRT) versus cardiac resynchronization therapy (BiV-CRT). This study is located in Rochester, New York.
Adult, Older Adult
Recruiting
Tennessee
Are you a female between 18 and 55 years old who has postural tachycardia syndrome (POTS)? This study is looking at the sympathetic nervous system and its effect on the increased heart rate and dizziness upon standing that people with POTS experience. This study is located in Nashville, Tennessee.
Adult
Accepting Healthy Volunteers
Female
Recruiting
Oklahoma
Are you an adult with postural tachycardia syndrome (POTS)? This study is investigating whether an antibody-mediated autoimmune reaction lead to the dizziness and other symptoms of POTS. The study will also test whether vagal stimulation improves POTS symptoms. This study takes place in Oklahoma City, Oklahoma.
Adult, Older Adult
Accepting Healthy Volunteers
Recruiting
Wisconsin
Are you at least 12 weeks pregnant? This study is recruiting women with healthy pregnancies and women who have experienced an abnormal fetal heart rate or rhythm. Researchers are evaluating fetal magnetocardiography as a new tool to improve the study of fetal heart rate and rhythm. This study is located in Madison, Wisconsin.
Adult, Older Adult
Accepting Healthy Volunteers
Female
Recruiting
Maryland
Are you a former smoker with COPD? Researchers are studying whether taking aspirin can help with COPD symptoms. Participants must be at least 40 years old, be diagnosed with COPD, and have a history of smoking at least 10 packs of cigarettes a year. The study is taking place in Baltimore, Maryland.
Adult, Older Adult
Recruiting
Maryland
Are you an adult diagnosed with COPD? If so, you may be able to participate in a clinical trial where researchers are studying whether a home delivery program with foods meant to help increase the amount of omega-3 that you eat can help with COPD. You must be at least 40 years old and diagnosed with COPD to participate. The study is taking place in Baltimore, Maryland.
Adult, Older Adult
Recruiting
Pennsylvania
Are you a smoker with COPD who is willing to use an e-cigarette to reduce how much you smoke? If so, you may be able to participate in a study that is trying to learn more about the effect of switching from smoking cigarettes to using e-cigarettes on COPD symptoms. You may be able to participate if you are 21 to 74 years old, have mild to moderate COPD, and are willing to try e-cigarettes to cut back on your smoking. The study is taking place in Hershey, Pennsylvania.
Adult, Older Adult