Pediatric Truncus Arteriosus

Truncus arteriosus is rare – it affects about 250 newborns every year – so it’s important to seek care from heart specialists experienced in treating this life-threatening condition.

At Children's Health℠ Heart Center, we perform hundreds of heart surgeries on newborns with complex heart disease like truncus arteriosus every year. We offer the expertise and complete care that can help your child get healthier and grow up.


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Park Cities

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What is Pediatric Truncus Arteriosus?

A baby born with truncus arteriosus has one large blood vessel leaving the heart instead of two separate ones.

Truncus arteriosus is a rare type of congenital heart disease. As a baby develops in the womb, the blood vessel coming out of the heart should separate into the:

  • Aorta, the body’s main blood vessel going to the body
  • Pulmonary artery, the blood vessel that carries blood from the heart to the blood vessels in the lungs for oxygen

With truncus arteriosus, this separation doesn’t occur. The heart has just one large blood vessel. As a result, blood with high and low oxygen mixes. This reduces the amount of oxygen being carried by the blood flowing through your child’s body. There’s also too much blood going to the lungs, which makes a child’s breathing rapid and the heart work harder. High blood pressure may develop in the lungs (pulmonary hypertension).

A child with truncus arteriosus also has a hole between the heart’s lower left and right pumping chambers (ventricles). This is known as a ventricular septal defect (VSD).

What are the signs and symptoms of Pediatric Truncus Arteriosus?

Symptoms of truncus arteriosus may appear within hours or days after birth. Many babies with truncus arteriosus develop a mild gray or blue skin tint (cyanosis) due to low oxygen. Their skin may also feel cool.

Other signs of truncus arteriosus include:

How is Pediatric Truncus Arteriosus diagnosed?

Doctors at our Fetal Heart Program diagnose truncus arteriosus before a child is born. Or a newborn checkup at the hospital may detect a heart murmur and low oxygen that indicate a problem.

Children’s Health is known for having some of the most advanced pediatric cardiac imaging technology in the region with equipment designed for the smallest patients.

  • This condition is typically diagnosed by an echocardiogram.
  • If necessary, we may perform a pediatric MRI or CT scan to help to diagnose this heart condition.

What causes Pediatric Truncus Arteriosus?

Truncus arteriosus and other congenital heart diseases usually occur for no known reason. Heart defects aren’t brought on by a woman’s actions during pregnancy.

Some children with truncus arteriosus may also have DiGeorge (22q11.2 deletion) syndrome. This condition is the result of a missing part of a chromosome (a child’s genetic makeup). If a child has truncus arteriosus and other signs of DiGeorge syndrome like a cleft palate (gap in the roof of the mouth), our genetic specialists conduct blood tests to check for the condition. Children with DiGeorge syndrome receive care from our cardiologists and other specialists through our innovative 22q Team Program.

How is Pediatric Truncus Arteriosus treated?

A baby with truncus arteriosus needs corrective heart surgery within the first month of life. Our pediatric heart specialists assess your baby’s unique heart anatomy and overall health to design a customized treatment plan. Because of our extensive experience with complex pediatric heart surgeries in infants, you can feel confident placing your baby in our care.

Surgery to correct truncus arteriosus involves:

  • Creating a new aorta using the original single blood vessel
  • Using a tube and an artificial valve to create a pulmonary artery
  • Closing the hole between the heart’s lower chambers by placing a patch over the VSD

Truncus Arteriosus Repair

Pediatric Truncus Arteriosus Doctors and Providers

Children with truncus arteriosus receive expert care from our heart specialists. We excel at surgeries to treat this rare heart condition.

Frequently Asked Questions

  • What type of follow-up care does my child need?

    Even after surgery, a child may develop an obstructed valve (stenosis), leaky heart valve (regurgitation), an abnormal heart rhythm (arrhythmia) or weakened heart muscle. Ongoing heart monitoring by a cardiologist can catch these problems early and prevent serious complications.

    Your child will also need additional surgeries to replace the tube and valve (artificial pulmonary artery), which can’t grow with your child’s body.

  • What is the outlook for children with truncus arteriosus?

    Without surgery, truncus arteriosus is a life-threatening condition. With proper, ongoing heart monitoring, most children live full adult lives. A cardiologist should monitor your child's heart health to diagnose potential problems quickly.

    When your child becomes an adult, they can receive care through our Adult Congenital Heart Disease Program.

  • Will my child be able to participate in sports with truncus arteriosus?

    Each child’s situation is different. Your child’s cardiologist can evaluate your child’s heart health to determine which sports and physical activities are safe.