Bens Friends Our mission at Ben’s Friends is to ensure that patients living with rare diseases or chronic illnesses, as well as their caregivers, family, and friends, have a safe and supportive place to connect with others like them. FAQ FAQ about the Congenital Heart Defects Community Welcome A congenital heart defect is a problem with the structure of the heart. It is present at birth. Congenital heart defects are the most common type of birth defect. The defects can involve the walls of the heart, the valves of the heart, and the arteries and veins near the heart. They can disrupt the normal flow of blood through the heart. The blood flow can slow down, go in the wrong direction or to the wrong place, or be blocked completely.