Hypoplastic left heart syndrome is treated through several surgical procedures or a heart transplant. Your child's doctor will discuss treatment options with you.
If the diagnosis has been made before the baby is born, doctors usually recommend delivery at a hospital with a cardiac surgery centre.
Your baby's doctor might recommend several options to help manage your baby's condition before surgery or transplant, including:
- Medication. The medication alprostadil (Prostin VR Paediatric) helps widen the blood vessels and keeps the ductus arteriosus open.
- Breathing assistance. If your baby has trouble breathing, he or she may need help from a breathing machine (ventilator) to get enough oxygen.
- Intravenous fluids. Your baby will receive fluids through a tube inserted into a vein.
- Feeding tube. If your baby has trouble feeding or tires while feeding, he or she can be fed through a feeding tube.
- Atrial septostomy. This procedure creates or enlarges the opening between the heart's upper chambers (atria) to allow more blood flow from the right atrium to the left atrium if the foramen ovale closes or is too small. If your baby already has an atrial septal defect, an atrial septostomy might not be necessary.
Surgeries and other procedures
Your child will likely need several surgical procedures to treat hypoplastic left heart syndrome. Surgeons perform these procedures to create separate pathways to get oxygen-rich blood to the body and oxygen-poor blood to the lungs. The procedures are done in three stages.
- Norwood procedure. This surgery is usually done within the first two weeks of your child's life. There are several ways to do this procedure.
Surgeons reconstruct the aorta and connect it to the heart's lower right chamber (right ventricle). Surgeons insert a tube (shunt) that connects the aorta to the arteries leading to the lungs (pulmonary arteries), or they place a shunt that connects the right ventricle to the pulmonary arteries. This method allows the right ventricle to pump blood to both the lungs and the body.
In some cases, a hybrid procedure is done. Surgeons implant a stent in the ductus arteriosus to maintain the opening between the pulmonary artery and aorta. Bands placed around the pulmonary arteries reduce blood flow to the lungs and create an opening between the atria of the heart.
After the Norwood procedure, your baby's skin will still have a blue coloring because oxygen-rich and oxygen-poor blood continue to mix within the heart. Once your baby successfully passes through this stage of treatment, the odds of survival can increase.
- Bidirectional Glenn procedure. This procedure is generally the second surgery. It's done when your child is between 3 and 6 months of age. Doctors remove the first shunt attached to the pulmonary arteries, and then connect one of the large veins that normally returns blood to the heart (the superior vena cava) to the pulmonary artery instead. If surgeons previously performed a hybrid procedure, they'll follow additional steps during this procedure.
This procedure reduces the work of the right ventricle by allowing it to pump blood mainly to the aorta. It also allows most of the oxygen-poor blood returning from the body to flow directly into the lungs without a pump.
After this procedure, all the blood returning from the upper body is sent to the lungs, so blood with more oxygen is pumped to the aorta to supply organs and tissues throughout the body.
- Fontan procedure. This surgery is usually done when your child is between 18 months and 4 years of age. The surgeon creates a path for the oxygen-poor blood in one of the blood vessels that returns blood to the heart (the inferior vena cava) to flow directly into the pulmonary arteries. The pulmonary arteries then transport the blood into the lungs.
The Fontan procedure allows the rest of the oxygen-poor blood returning from the body to flow to the lungs. After this procedure, there's minimal mixing of oxygen-rich and oxygen-poor blood in the heart, and your child's skin will no longer look blue.
- Heart transplant. Another surgical option is a heart transplant. However, the availability of a heart to be used for transplant is limited, so this option is not used as often. After a heart transplant, your child will need medications throughout life to prevent rejection of the donor heart.