New clip aims to fix leaky heart valves without cutting chest open

This study tests a device called DragonFly that repairs a leaky mitral valve without open-heart surgery. It is for people with moderate-to-severe or severe mitral regurgitation who are at high risk for surgery or still have symptoms after medical treatment. The device is inserted through a vein in the leg and clips the valve to reduce leakage. Researchers will check if the valve stays fixed and if patients avoid death or heart failure hospitalization for one year.