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Pediatric Cardiology - Pulmonary Stenosis

​​​​​​​​​​​​​​​​​​​​​​Pulmonary Stenosis (PS) is a congenital heart defect (a child is born with it) and occurs when the valve between the right ventricle and the pulmonary artery doesn't open all the way. 

It can also occur when the area above or below the valve is too narrow. As a result, blood flow to the lungs is blocked, which can lead to certain heart problems over time. 

Marshfield Clinic has Pediatric Cardiologists to diagnose and treat any child with a congenital heart defect.


Mild or moderate PS usually requires no treatment, but regular visits with a pediatric cardiologist are needed to make sure that the narrowing at or near the valve doesn't worsen over time. 

Severe or critical PS does require treatment and is most often treated with a procedure called balloon valvuloplasty.

Balloon Valvuloplasty
Balloon valvuloplasty is a procedure done on the heart using a thin, flexible tube called a catheter. 

The catheter is inserted into a blood vessel in the groin. With the help of live x-rays, the catheter is advanced up through the blood vessel until it reaches the heart. 

A tiny balloon at the end of the catheter is then inflated one or more times in the pulmonary valve, which opens the valve leaflets. Then the catheter and balloon are removed.

Using open heart surgery, the valve is replaced or repaired.​

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What Do You Know About Birth Defects?

See how much you know about birth defects. Learn what you can do to lower your risk.

1. How many babies in the U.S. are born with birth defects?
2. When is an unborn baby most at risk of developing a birth defect?
3. Which of these is a common birth defect?
4. Which of these habits of the mother-to-be can be harmful to the fetus?
5. A woman who is pregnant or considering pregnancy should get a health checkup. Which of these vaccines should be up to date before she gets pregnant because of the danger of the disease to the fetus?
6. Healthcare providers advise women to take 400 mcg of folic acid daily before they get pregnant and during pregnancy. What can this help prevent in the baby?
7. Pregnant women should not handle cat litter to lower the risk of becoming infected with which of these?
8. Which of these kinds of medicines can cause birth defects if taken when pregnant?
9. During prenatal care, a healthcare provider may recommend genetic screening tests for certain disorders. What is one thing that amniocentesis tests for?
10. Extra or missing chromosomes trigger genetic birth defects. What factor greatly increases the risk for an abnormal number of chromosomes in the fetus?