Arteriovenous hemangioma/malformation

This study tests an experimental drug called ATV-1601 in people with moderate to severe HHT, a condition that causes frequent nosebleeds and anemia. The trial has two parts: first, participants receive either the drug or a placebo to check safety and effectiveness; then, all elig…

This study is checking how well a device called the Cera Vascular Plug works and if it is safe. The plug is used to block blood flow in certain blood vessels to treat conditions like aneurysms, abnormal connections between arteries and veins, and other problems. About 132 adults …

This study tests whether sirolimus, a drug used to prevent organ rejection, can shrink severe arteriovenous malformations (AVMs) and ease symptoms. About 50 people aged 2 and older with advanced AVMs will take the drug for a year. The goal is to see if the drug reduces AVM size b…

This phase 2 trial is testing two targeted drugs—alpelisib and mirdametinib—in 50 people with slow-flow or fast-flow vascular malformations that haven't responded to standard treatments. The goal is to see if these drugs can improve each person's most bothersome symptom over 48 w…

This study tests a head-worn ultrasound device called SONAS that listens for bubble signals in the brain during a standard heart ultrasound. It aims to see if the device can accurately detect right-to-left shunts—abnormal connections between blood vessels—in adults with hereditar…

This observational study will follow 2,500 people who had a brain hemorrhage and received minimally invasive surgery. Researchers want to see how well patients recover in real-world settings. The study does not test a new drug or procedure, but gathers data to improve future care…

This study creates a large registry of people diagnosed with hereditary hemorrhagic telangiectasia (HHT), a condition causing abnormal blood vessels and bleeding. Researchers will collect medical records and annual health updates for up to 10 years to understand how the disease c…

This study will follow 10 adults with unruptured brain arteriovenous malformations (AVMs) who are scheduled for surgery. Researchers will use special brain scans to measure blood flow and energy use in different brain regions before and six months after the operation. The goal is…

This study looks at whether people who have a blood clot in the lungs (pulmonary embolism) are more likely to have a stroke if they also have a small hole in their heart (called a PFO). About 1 in 4 people have this hole, which can let a clot travel to the brain. Researchers will…

This study is gathering information from 4500 people who have or will have brain surgery for conditions like aneurysms, tumors, epilepsy, and Parkinson's disease. The goal is to find patterns that help doctors predict how well someone will recover. By standardizing how outcomes a…

This study will follow 1,000 people of all ages who are having endovascular procedures (minimally invasive treatments through blood vessels) for brain or spinal conditions like aneurysms or abnormal blood vessels. Researchers will record complications, recovery, and changes in th…

This study follows 400 pregnant women with rare blood vessel diseases (like HHT, Marfan syndrome, or lymphedema) to learn about serious pregnancy complications. Researchers will ask participants about their health during pregnancy and for 12 months after birth. The goal is to gat…

This study follows 1000 adults who have had embolization for brain arteriovenous malformations (AVMs). The goal is to collect standardized long-term data, such as how well the AVM remains blocked over time. Currently, follow-up practices vary widely, so this research aims to impr…

This study looks at the genes of 300 people with brain or spinal cord arteriovenous malformations (AVMs) to see if certain mutations affect the risk of bleeding. Researchers will compare genetic information with medical outcomes to better understand why some AVMs cause serious pr…