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 12 results
Recruiting
Wisconsin
Does your developing baby have a heart defect? Have you had a stillborn baby? This study tests a new technology to measure fetal heart activity and find possible problems early. These problems include fetal arrhythmia and conduction disorders such as Brugada syndrome. To participate in this study, you must be at least 18 years old and pregnant, and have one of five high-risk complications of pregnancy: a fetus with a major congenital heart defect, hydrops, or gastroschisis; a previous unexplained stillbirth; or twins who share a placenta. This study is located in Madison and Milwaukee, Wisconsin.
Adult, Older Adult
Female
Recruiting
Tennessee
Have you been diagnosed with orthostatic intolerance? This study aims to find out how the body’s regulation of basic functions, such as heart rate and blood pressure, is altered in people who have orthostatic intolerance. This condition, which has an unknown cause, is characterized by a racing heartbeat, dizziness, lightheadedness, and other symptoms that occur when a person stands up. To participate in this study, you must be between 18 and 80 years old and have orthostatic intolerance. This study is located in Nashville, Tennessee.
Adult, Older Adult
Accepting Healthy Volunteers
Recruiting
Do you have a high-risk pregnancy? This study will investigate the use of a non-invasive scan called fetal magnetocardiography to detect potential problems in the fetus in five high-risk pregnancy conditions associated with stillbirth. The scan is normally used to look at fetal heart rhythms. To participate in this study, you must be at least 18 years old and pregnant with one of the following: having a stillbirth in a previous pregnancy, carrying identical twins, or having a fetus that has been diagnosed with major congenital heart disease, fetal hydrops, or fetal gastroschisis. This study takes place in Madison and Milwaukee, Wisconsin.
Female
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
Has your newborn been diagnosed with patent ductus arteriosus? Patent ductus arteriosus (PDA) is a condition in which a connection between two major blood vessels close to the heart does not close properly after birth. This affects blood flow to the lungs and may cause neonatal respiratory diseases. PDA may correct itself, but sometimes treatment may be necessary. This study aims to identify ways by which doctors can predict which cases of PDA need to be treated. To participate in this study, your newborn must have been born between 23 and 29 weeks’ gestation and have been diagnosed with PDA. This study is located in Columbus, Ohio.
Child
Recruiting
Indiana
Have you been diagnosed with high blood pressure while pregnant? This study is investigating whether a mother’s blood pressure during pregnancy affects her newborn’s lung development. To participate in this study, your newborn must have been born either prematurely at more than 25 weeks’ gestation or at full term to a healthy mother or a mother who was diagnosed with high blood pressure during pregnancy. This study is located in Indianapolis, Indiana.
All Ages
Recruiting
Florida
Is your newborn in the NICU at Holtz Children’s Hospital in Miami? Newborns born very prematurely often need oxygen therapy or ventilation to help them breathe and survive. This study will help doctors understand how changes in oxygen and carbon dioxide levels while newborns are getting treatment affect how their lungs develop. While your newborn is in the newborn neonatal intensive care unit (NICU), researchers will record his or her oxygen and carbon dioxide levels, heart rate, and other measures. To participate in this study, your newborn must have been born prematurely between 23 and 28 weeks’ gestation, be less than 28 days old, and be receiving oxygen therapy. This study is located in Miami, Florida.
All Ages
Recruiting
Indiana
Was your newborn born prematurely? This study aims to better understand the effects of premature delivery on a baby’s lungs during his or her first year of life. To participate in this study, your newborn must have been born prematurely between 24 and 36 weeks’ gestation and not have any congenital heart or lung defects. This study is located in Indianapolis, Indiana.
Child
Recruiting
New York
Do you or your child have a platelet, bleeding, or white blood cell disorder? This study is looking at people who have platelet or other blood disorders. The researchers will use a blood sample to look for problems with platelets and a possible genetic cause in the participant’s DNA or RNA. To participate in this study, you must be a child or adult who either is healthy or has a platelet disorder, coagulation disorder, or white blood cell disorder. This study is located in New York, New York.
All Ages
Accepting Healthy Volunteers
Recruiting
Massachusetts
Does your infant have a low platelet count? This study is investigating the safety and efficacy of platelet transfusion as a treatment for infants with thrombocytopenia. Researchers are looking at the positive effects of platelet transfusion against the negative effects, such as the release of inflammatory molecules and the formation of blood clots. To participate in this study, your child must be younger than 6 months old and have a low platelet count (less than 100 × 109/L). This study takes place in Boston, Massachusetts.
Child