Clinical Trials

Are you an adult who gets little exercise and sits a lot every day? If you sit for more than 8 hours a day and exercise less than 90 minutes per week, this study may interest you. Researchers want to see if walking or standing breaks during long sitting periods can make your heart healthier. To take part in this study, you must be 36 to 55 years old. You also should be able to walk four blocks and go up two flights of stairs. The study is taking place in Chapel Hill, North Carolina.

Are you 75 years old or older and interested in participating in a clinical trial where researchers are studying whether statins, which are often used to treat high cholesterol, can help improve heart and brain health. To participate, you cannot have cardiovascular disease or dementia. The study is taking place at locations in Alabama, Arizona, Arkansas, California, Connecticut, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Nebraska, Nevada, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Utah, Virginia, West Virginia, Wisconsin, and Puerto Rico.

Are you an adult with atrial fibrillation? In this study, researchers are comparing a continuous direct oral anticoagulation (DOAC) use versus time-limited (1 month) DOAC guided by an AF-sensing Smart Watch (AFSW) for persons with atrial fibrillation and a moderate risk of stroke. Participants must be between the ages of 22 and 85 and have a history of atrial fibrillation. The study is taking place at locations in California, Colorado, Florida, Georgia, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Missouri, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Pennsylvania, South Carolina, Texas, Virginia, Wisconsin, and Washington, D.C.

Do you have mitral valve disease? This clinical trial is testing different types of images taken of the heart to learn more about mitral valve disease and the best ways to treat it. You must be 60 years old to participate. The study is enrolling patients in locations in Arkansas, California, Georgia, Indiana, Louisiana, Maine, Maryland, Massachusetts, Michigan, Missouri, New York, North Carolina, Ohio, Pennsylvania, and Quebec City, Canada.

Are you 15 to 40 years old and have severe sickle cell disease? This study is comparing long-term outcomes for patients who receive blood and bone marrow transplants and those who receive standard treatment with medicines. Participants also have an option of contributing blood samples to be stored for future research. Participants must be 15 to 40 years old and have severe sickle cell disease. This study is located in Madison, Wisconsin.

Do you or your child have sickle cell disease and also have an interest in contributing to long-term data collection? This study is monitoring patients and collecting biological samples from patients who have sickle cell disease to better understand long-term outcomes. Participants can be any age and must have sickle cell disease. This study is located in six sites in Illinois, Louisiana, North Carolina, and Tennessee.

Did you develop atrial fibrillation after coronary artery bypass graft (CABG) surgery? Did you develop atrial fibrillation after a coronary artery bypass grafting (CABG) surgery? This study is looking at how well oral anticoagulation medicines work to prevent complications, such as blood clots and heart attack, for patients who experience post-operative atrial fibrillation (POAF). This study is in multiple locations around the country.

Are you an adult with sickle cell disease? This study aims to determine whether monthly exchange blood transfusions (removing blood and replacing it with transfused red blood cells) can improve health and prevent or reduce the number of pain crises. To participate in this study, you must be at least 18 years old, have sickle cell disease, and have not been on a chronic exchange transfusion program for at least 2 months. This study is located in Pittsburgh, Pennsylvania.

Do you have symptoms of a lung disease (such as long-term wet cough, bronchiectasis, or recurrent pneumonia) with no genetic diagnosis? This study aims to develop new ways to diagnose primary ciliary dyskinesia (PCD) or primary immune deficiency (PID), two conditions that can have similar symptoms. Researchers will combine information from genetic testing, lung imaging, and lung function tests to diagnose and tell the difference between these two conditions. Participants in this study must be 5 to 45 years old and must have symptoms of a serious lung disease but no diagnosis. This study is taking place at multiple locations in the United States and in Canada, including the NIH Clinical Center in Bethesda, Maryland.

Are you an adult who receives long-term red blood cell transfusion therapy for sickle cell disease? This 3-month study tests whether donated blood that is more than 30 days old leads to more infections in people with sickle cell disease than blood that is less than 10 days old. Some hospitals around the United States have requirements regarding the age of donor blood. This research aims to inform new evidence-based policies on the age and use of donor blood in people with sickle cell disease that rely on blood transfusions. To participate in this study, you must be between 16 and 45 years old, have sickle cell disease, and be receiving long-term red blood cell transfusion therapy. This study takes place in Atlanta, Georgia; Chapel Hill, North Carolina; and Milwaukee, Wisconsin.