Intramyocardial Injection of Autologous Umbilical Cord Blood Derived Mononuclear Cells During Surgical Repair of Hypoplastic Left Heart Syndrome

Researchers want to better understand what happens to the heart when the stem cells are injected directly into the muscle of the right side of the heart during the Stage II palliative surgery for single ventricle patients with hypoplastic left heart syndrome (HLHS) or HLHS variant. Researchers want to see if there are changes in the heart's structure/function following this stem cell-based therapy and compared to children that have not had cell-based therapy.