Following completion of training in adult cardiothoracic surgery and pediatric cardiothoracic surgery, I joined the staff at Boston Children’s Hospital. I am the surgical director for the complex biventricular repair program, and adult congenital heart program. My clinical expertise also includes valve repair and replacement strategies, neonatal heart surgery, and minimally invasive surgery for children. My research efforts include strategies to “grow” a left heart – including stem cell therapy - in patients with borderline left heart who otherwise would undergo single ventricle palliation. A major problem in children with heart valve disease is the lack of a valve that can grow as a child grows. This motivated me to pursue a design of expandable valve technologies, to reduce the need for reoperation in children. Additional research interests include use of 3-D printing for surgical planning and understanding the clotting system in children after heart surgery.