One example of the possible connections is shown above. Part of the mixed blood goes back to the lungs causing extra blood flow to the lungs. This mixed blood then flows to the left ventricle and out through the aorta to the body. In addition, the right side of the heart usually enlarges.
Infants can grow poorly, tire easily, and breathe rapidly.
Surgery is required, and is usually accomplished in infancy. This helps prevent the uncommon, but possible occurrence of bacterial infection forming on the heart lining near the surgical repair.