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by Deanna M. Neff, MPH
Pulmonary atresia is a rare heart defect. In a normal heart, the blood flows in from the body to the right atrium. It then goes into the right ventricle. Next, the blood travels to the lungs through the pulmonary valve. There, it picks up fresh oxygen. The blood then returns to the left atrium and goes into the left ventricle. The blood moves out to the rest of the body.
With this defect, there is no pulmonary valve in the heart. Blood cannot flow into the pulmonary artery. This is the artery that brings blood to the lungs. Other heart problems, like a small right ventricle, may also be present.
Pulmonary atresia is present at birth. It is not known exactly why the heart does not develop normally.
Risk Factors TOP
These factors increase the chance of pulmonary atresia in your child:
Symptoms may include:
You will be asked about your child's symptoms and medical history. A physical exam will be done. Your child's doctor may also detect a heart murmur during the exam.
Images may be taken of your child's chest. This can be done with:
Talk with the doctor about the best treatment plan for your child. Some defects may be so severe that they are difficult to treat. Treatment options include:
Medications will be given to keep a vessel that connects the pulmonary artery and the aorta open. This opening allows some blood to continue to reach the lungs, especially when the ventricular septum is intact. This is a temporary treatment.
Sometimes a shunt can be placed between the aorta and pulmonary artery. This is done to improve blood flow to the lungs.
Several surgeries may be considered depending on:
Open heart surgery aims to:
When the right ventricle is too small to pump blood effectively, other surgeries may be done. These can reroute blood to the lungs.
Lifelong Monitoring TOP
Your child will need to see a heart specialist regularly. Your child may need to take antibiotics prior to certain medical or dental procedures. This is to prevent heart infections.
There are no current guidelines to prevent pulmonary atresia because the cause is unknown.. Getting appropriate prenatal care is always important.
American Heart Association
Healthy Children—American Academy of Pediatrics
Canadian Cardiovascular Society
Heart and Stroke Foundation of Canada
Single ventricle defects. American Heart Association website. Available at:
...(Click grey area to select URL)
Updated October 21, 2015. Accessed June 6, 2016.
Tetralogy of Fallot in infants and children. EBSCO DynaMed Plus website. Available at: http://www.dynamed.... Updated January 25, 2016. Accessed June 3, 2016.
Last reviewed June 2016 by Kari Kassir, MD
Last Updated: 5/11/2013
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