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 26 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
New York
Are you between the ages of 18 and 50 and diagnosed with Friedreich's ataxia? In this study, researchers are testing a new medication, gene therapy, to treat cardiomyopathy associated with Friedreich's ataxia, and you may be able to participate if you are not taking any corticosteroids or immunosuppressive medications to treat Friedreich's ataxia. This study is taking place in New York City, New York.
Adult
Recruiting
Connecticut
Massachusetts
New York
Do you have heart failure? In this clinical trial, researchers are using images of the heart and blood tests to learn more about Black and Hispanic patients with heart failure. You may be able to participate if you are at least 60 years old; of Black, Hispanic, or Caribbean origin; and have been diagnosed with heart failure. The study is taking place in locations in Connecticut, Massachusetts, and New York.
Adult, Older Adult
Recruiting
California
Are you and adult diagnosed with hypertrophic cardiomyopathy? If so, you may be able to participate in this study where researchers are studying whether exercise helps cardiomyopathy symptoms. You may be able to participate if you are between 18 and 80, have cardiomyopathy, and are able to participate in a 24-week moderate exercise training program. The study is taking place in San Francisco, California.
Adult, Older Adult