Essentially, the connections in the heart are "swapped." The baby will immediately receive a medicine called prostaglandinthrough an IV (intravenous line). This medicine helps keep a blood vessel called the the ductus arteriosus open, allowing some mixing of the two blood circulations. A procedure using a long, thin flexible tube (balloon atrial septostomy) may be needed to create a large hole in the atrial septum to allow blood to mix. CHDs affect nearly 1,666,108?births per year in the France. Further research is being conducted to determine the best surveillance interval to monitor the disease. Maternal Congenital Cardiac Disease: Outcomes of Pregnancy in a Single Tertiary Care Center.