The Bidirectional Glenn (BDG) procedure is a type of heart surgery used primarily to treat complex congenital heart defects, particularly in neonates and infants. It serves as part of a staged surgical approach to improve blood flow in patients who have single-ventricle physiology, such as Hypoplastic Left Heart Syndrome (HLHS) or Tricuspid Atresia. In essence, the BDG connects the superior vena cava (SVC) to the pulmonary arteries, allowing deoxygenated blood from the upper body to flow directly into the lungs for oxygenation without passing through the heart.
