Tetralogy of Fallot

Tetralogy of Fallot is a relatively rare condition that affects about 3 in 10,000 live births. It refers to a combination of four congenital (present at birth) heart defects:

  • A ventricular septal defect (VSD), a hole between the heart’s right and left ventricles
  • Pulmonary stenosis, narrowing of both the pulmonary valve and the artery that connects the heart with the lungs
  • Right ventricular hypertrophy, in which the muscle of the right ventricle becomes thickened
  • An overriding aorta, in which the aorta (the main artery that carries oxygen-rich blood to the body) is not in the proper place

Remarkable Care for Kids

  • Expert care for kids of all ages with heart defects: The Rush Pediatric Congenital Heart Disease Program provides family-centered, state-of-the-art care for infants, children, adolescents and teenagers who are born with heart defects.
  • Coordinated care: Fetal cardiologists at Rush University Children's Hospital work closely with specialists in the Fetal and Neonatal Medicine Center to diagnosis congenital heart conditions like tetrology of Fallot during pregnancy. They then work coordinate care with your care team to create a personalized care plan for the rest of the pregnancy and for your baby immediately after birth.
  • Care close to home: Pediatric cardiologists from Rush University Children's Hospital see patients at a number of convenient locations. They are available to see patients at our Rush campus in Chicago, Rush Oak Park Hospital, Rush Copley Medical Center in Aurora, and at satellite locations throughout the city and the suburbs, including Evergreen Park, Joliet, Hoffman Estates, Tinley Park and Crown Point, IN.
  • Family-centered care: Rush University Children's Hospital, a regional referral center, is home to compassionate experts from more than 30 specialties who care for children of all ages. At Rush, we put families first and are committed to involving you in every aspect of your child's care.

What is tetralogy of Fallot?

In babies and children with tetralogy of Fallot, the blood leaving the heart doesn’t get enough oxygen to feed the rest of the body. This can cause a variety of issues, including the following:

  • Bluing of the skin, lips and fingernails (cyanosis)
  • Breathing problems
  • Heart murmur
  • Fatigue during feedings, which can affect the baby’s ability to gain weight normally
  • Clubbed (widened and rounded) fingers

These things may contribute to a woman having a baby with tetralogy of Fallot:

  • Drinking alcohol during pregnancy
  • Being over the age of 40
  • Having diabetes
  • Genetics (women who had tetralogy of Fallot or other congenital heart defects may be more likely to have children with this defect)

Tetralogy of Fallot and other congenital heart defects often affect children with genetic disorders such as Down syndrome, DiGeorge syndrome and others.

With advances in congenital heart surgery, most children with tetralogy of Fallot live to be adults. But they may need additional surgeries or medical procedures as they grow. And because their heart condition makes them vulnerable to other health problems, they require lifelong monitoring and care from cardiologists.

Symptoms of tetralogy of Fallot

As with many congenital heart defects, signs and symptoms of tetralogy of Fallot typically appear right after or within a few weeks of birth. One of the most common telltale signs is a bluish tint to the skin, lips and fingernails — or cyanosis — due to low oxygen levels in the blood.

You may also notice the following issues with your baby:

  • Has difficulty breathing
  • Grows very tired and limp
  • Doesn’t respond to your voice or touch
  • Acts fussy
  • Loses consciousness
  • Gets very tired during feedings (and, as a result, may not be gaining weight normally)
  • Has clubbed (widened and rounded) fingers

If your baby has any of these symptoms, call your child's pediatrician right away. Your child's pediatrician may refer you to a pediatric cardiologist at Rush.

Care for tetrology of Fallot at Rush

Diagnosis: After your baby is born

A pediatric cardiologist will do a physical exam and may run one or more of the following tests to determine whether your baby has tetralogy of Fallot:

  • Echocardiogram
  • Electrocardiogram (EKG)
  • Chest X-ray
  • Cardiac catheterization

Diagnosis: Before your baby is born

The condition can also be diagnosed before birth with a test called fetal echocardiogram. This is done in the following instances:

  • The pregnant mother has risk factors for suspecting tetralogy of Fallot in the fetus, such as exposure to alcohol, diabetes or a family history of congenital heart defects
  • There is a suspicion that the fetus has a cardiac abnormality on obstetrical ultrasound screening


If your baby has tetralogy of Fallot, pediatric heart surgeons at Rush will repair all four defects with open-heart surgery to help your baby’s heart work as normally as possible.

Surgery may be done soon after birth or a few months later, depending on the following:

  • Your baby’s weight
  • Your baby’s overall health
  • The severity of the defects — especially the narrowing in the pulmonary artery
  • The severity of your baby’s symptoms

If a baby is not big or strong enough for the full repair, doctors may recommend a temporary surgery or nonsurgical procedure. This procedure will improve oxygen levels in the blood, giving the baby time to grow and get stronger. The full surgery to repair all four defects will then be performed once the baby is ready.

A pediatric cardiologist and pediatric heart surgeon will discuss your baby’s condition with you and come up with a treatment plan.

Because babies who are treated for tetralogy of Fallot are vulnerable to future heart problems, they require lifelong monitoring and care to stay as healthy as possible. Your baby’s care team will talk to you about follow-up visits and treatments — and what to expect as your child grows.

Tetralogy of Fallot Providers at Rush

Learn more about tetralogy of Fallot providers at Rush.

Meet our tetralogy of Fallot providers
stethoscope Meet our tetralogy of Fallot providers