Tricuspid Atresia | Diagnosis & Treatment

How is tricuspid atresia diagnosed?

Tricuspid atresia is usually diagnosed before birth with a fetal ultrasound or in the first few days of life. If your newborn baby was born with a bluish tint to the skin or other concerning symptoms, your pediatrician will refer you to a pediatric cardiologist, who will perform a physical exam along with some combination (not necessarily all) of the following medical tests:

What are the treatment options for tricuspid atresia?

Specific treatments for tricuspid atresia depend on the associated cardiac conditions and other variables. Most newborn babies with the condition are admitted to the intensive care unit (ICU) or special care nursery. Initially, your child may be placed on oxygen or (less commonly) a ventilator to help with breathing and may be given IV (intravenous) medications to help the heart and lungs function more efficiently.

Once your child is stabilized, your baby's treatments will probably include:

Cardiac catheterization

Prior to the initial surgery, or between staged operations (see below), doctors occasionally need to perform a cardiac catheterization procedure, although this is seldom needed in newborns with tricuspid atresia.


Doctors may administer an IV (intravenous) medication to prevent the closing of the infant's ductus arteriosus — the prenatal connection between the aorta and the pulmonary artery, which usually closes shortly after birth, but is in some babies important as a temporary alternative opening for blood flow to the lungs.


Since tricuspid atresia with an underdeveloped right ventricle is considered a single ventricle defect (where the defect results in just one fully functioning ventricle), it's usually treated using single ventricle palliation — a staged series of three operations performed between the first few days or months and the first few years of life. The first stage is to optimize the blood flow to the lungs, whether it's too much or too little. If the blood flow is too little, a Blalock-Taussig shunt is usually performed. If it's too much, the pulmonary artery may be banded to control blood flow. If it's neither too little nor too much, the first stage may be skipped, and the second stage — the bi-directional Glenn — may be performed at 4 to 8 months of age. 

For babies with tricuspid atresia and transposition of the great arteries and narrowing of the the aorta, a more complex operation, where the pulmonary artery is connected to the aorta, the aorta enlarged and a Blalock-Taussig shunt is placed, may be required.

Blalock-Taussig shunt

When the blood flow to the lungs is inadequate, this operation is usually performed a few days after birth to create a pathway for blood to reach the lungs. A small tube (about 3 ½ mm in diameter) made of Gore-tex material is connected to a branch of the aorta and the pulmonary artery. Some of the blood traveling through the aorta towards the body will “shunt” through this connection and flow into the pulmonary artery to receive oxygen.

Pulmonary artery banding (PAB)

This alternative first operation, done when the blood flow to the lungs is excessive, is performed to reduce and limit pulmonary artery blood flow. This is to prevent excessive work by the left ventricle, and to protect the small blood vessels in the lung from damage.

Bi-directional Glenn

The second operation, often performed when a child is between about 4 and 6 months old, reduces the left ventricle's workload and sets the stage for the Fontan procedure to come. This procedure replaces the Blalock-Taussig shunt (which the baby's heart will outgrow) with another connection to the pulmonary artery. The superior vena cava (the large vein that returns oxygen-poor blood from the head and arms back to the heart) is surgically connected to the right pulmonary artery so that blood can proceed directly to the lungs to receive oxygen.

Fontan procedure

This final operation in the sequence, done in the first few years of life, is performed for treatment of children with various types of single ventricle defects, including tricuspid atresia. The principle of the procedure is that it's not necessary to have a ventricle that pumps to the lungs, so long as small blood vessels in the lung are healthy and blood can flow through the lung at low pressure. It is necessary for the ventricle to readily accept blood coming back from the lungs and to function well. The surgery involves directly connecting the returning blue blood from both the upper and lower parts of the body into the pulmonary arteries. This can be achieved in a number of different ways — sometimes with, and sometimes without, the use of synthetic tubes (conduits).

Biventricular repair

In some instances, your baby’s single ventricle heart can be converted into two functioning ventricles (biventricular circulation). This repair can be the initial procedure or single ventricle palliation may be used before converting the heart to biventricular circulation.

Home Monitoring Program

An infant with a single ventricle needs somewhat closer monitoring and support than one with two ventricles. Research shows the vital importance of a Home Monitoring Program, including daily at-home assessments of oxygen saturations and weight between the stage I (neonatal) and stage II (bi-directional Glenn) surgeries. We have a very experienced Home Monitoring Program to provide these special babies and their families the support that they need.

What is the long-term outlook for tricuspid atresia?

Surgical techniques for tricuspid atresia and its associated defects are continually being refined with long-term outcomes continually improving. Nevertheless, children with tricuspid atresia will need lifelong monitoring and medication, since they will always be at some risk for arrhythmias, infections, heart failure or stroke.

Your cardiologist will help you create a long-term care program as your baby grows into childhood, the teen years and even adulthood. Most people who've had congenital heart disease repair will have an ongoing relationship with their cardiologist. We'll help prevent and treat complications and will advise on daily-life issues, such as activity levels, nutrition and precautions related to pregnancy.