Dr. David Hurst, Dr. Sumeet Sharma, Dr. Yvonne Bremer and Dr. Michael Lisle are the only board-certified pediatric cardiologists located at East Tennessee Children’s Hospital. Along with their expert care team, they are committed to caring for children with all heart conditions, including birth defects. They are connected with the region’s only hospital dedicated just for kids. Our heart doctors are committed to detecting and treating problems before birth, throughout childhood and even into adult life.