Health Library

Pulmonary Angioplasty for Children

Doctors use a small balloon on a thin tube called a catheter. They put the catheter through a blood vessel in the groin or neck and guide it through the body’s blood vessels to the lungs. When they reach the narrowed area of the pulmonary artery, they gently inflate the balloon to widen it. This improves blood flow from the heart to the lungs.

The procedure is also called balloon pulmonary angioplasty. The doctor who performs the procedure is called a pediatric interventional cardiologist.

Why Children May Need Pulmonary Angioplasty

Some children are born with narrow pulmonary arteries or a narrow pulmonary valve, while others can sometimes develop narrowing over time. When arteries are narrow, less blood reaches the lungs. This can lower oxygen levels in the body and make the heart work harder.

Pulmonary angioplasty is often used to treat:

• Pulmonary valve stenosis – narrowing of the valve that allows blood to leave the right side of the heart and enter the main pulmonary artery
• Branch pulmonary artery stenosis – narrowing of the right or left pulmonary artery
• Peripheral pulmonary stenosis – narrowing of the smaller pulmonary arteries as they branch further and head towards the lungs

Doctors may recommend pulmonary angioplasty when blood flow to the lungs is too low or the heart is under strain. In some cases, this procedure can delay or reduce the need for open chest surgery. It is often part of care for children with complex heart conditions that affect oxygen levels.

When doctors relieve stenosis of the pulmonary valve, the procedure is called balloon pulmonary valvuloplasty. When doctors relieve stenosis of the pulmonary arteries, the procedure is called pulmonary angioplasty.

How the Pulmonary Arteries Normally Work

The heart is a strong muscle that pumps blood through the body. It has four chambers: two upper chambers (left atrium and right atrium) and two lower chambers (left ventricle and right ventricle).

The heart pumps blood to the lungs to pick up oxygen, with the right ventricle pushing blood into the pulmonary arteries. These arteries carry blood to the lungs, where they receive oxygen before returning to the heart and body.

Healthy arteries are wide and open, allowing blood to flow easily. When arteries are narrow, pressure can build in the heart and affect how well it works.

How Pulmonary Angioplasty Is Performed

Pulmonary angioplasty is done during cardiac catheterization. A doctor makes a small cut in the groin or neck and puts a thin, flexible tube into a blood vessel.

Using X-ray imaging for guidance, the doctor carefully guides the catheter to the narrowed part of the pulmonary artery or pulmonary valve. Once in place, a small balloon at the tip of the catheter is inflated to stretch the narrow area and open the artery. This allows blood to flow more easily.

In some cases, a small metal tube called a stent is placed to help keep the artery open. The stent is left in place, and either stays in the body forever or can be surgically removed at the time of a future surgery, if indicated.

The balloon is then deflated and removed along with the catheter.

Preparing for Pulmonary Angioplasty in Children

Before the procedure, your child will have tests to look closely at their heart and lungs. These include an electrocardiogram (EKG), chest X-ray, echocardiogram and blood tests. These tests make sure the child is stable and provide updated images for the care team.

You will get instructions about eating, drinking, what medications to take and when to arrive. Typically, the child should not eat solid food for eight hours before the procedure. They may have clear liquids until three hours before. If the child takes blood thinners, they may need to stop a few days before.

Plan to arrive two hours before the procedure.

It is normal for children to feel nervous, so simple and honest explanations can help them feel more at ease.

Your care team will guide you through each step, answer questions and help you prepare.

What Happens During the Pulmonary Angioplasty Procedure?

Your child will get sedation or anesthesia so they can sleep through the procedure. This keeps them comfortable and still. The care team will closely monitor your child’s heart rate, oxygen levels and blood pressure.

The doctor places the catheter and inflates the balloon to open the artery. The procedure usually takes two to four hours. Blood flow often improves right away.

Afterward, your child will go to a recovery room to wake up from sedation. They may need to lie flat for several hours to prevent bleeding from the catheter site.

Pulmonary Angioplasty Recovery in Children

After the procedure, your child will be monitored in the hospital. Most children go home the same day or the next day. Your child should avoid contact sports and other strenuous activity for five to seven days.

Follow-up visits are important. Doctors may use imaging to check how well blood is flowing through the pulmonary arteries. Younger children and babies may need more frequent follow-up visits than older children or adults in the first few months after recovery from pulmonary angioplasty.

Most children return to normal activities within a week.

What Are the Benefits and Possible Risks of Pulmonary Angioplasty?

Benefits of pulmonary angioplasty in children include:

• Improved blood flow to the lungs
• Increased oxygen levels
• Reduced strain on the heart

The procedure is less invasive than open-heart surgery. It often means less pain, fewer scars and a shorter hospital stay than surgery.

However, there are some risks. Risks of pulmonary artery angioplasty include:

• Bleeding or bruising at the catheter site
• Infection
• Temporary abnormal heart rhythms (arrhythmias)
• Injury to the artery
• Re-narrowing of the vessel over time (restenosis)

Careful follow-up helps watch for these risks and supports the best outcome.

What is the Long-Term Outlook After Pulmonary Angioplasty?

Most children do well after pulmonary angioplasty, with improved heart and lung function over time.

Some children may need repeat procedures if the artery narrows again.

Regular follow-up with a heart specialist is important to monitor progress. Advances in catheter-based treatments continue to improve outcomes for children. More children and adults are candidates for catheter-based procedures instead of surgery than was true even 10-20 years ago.

Frequently Asked Questions

What conditions are treated with pulmonary angioplasty?

Pulmonary angioplasty treats narrowing in the pulmonary arteries or pulmonary valve, including branch pulmonary artery stenosis and other related conditions.

Is pulmonary angioplasty safe for children?

Yes. It is a commonly used procedure, and the care team takes many steps to keep children safe.

Will my child need more than one procedure?

Some children may need repeat treatment if the artery narrows again over time.

How long does recovery take?

Most children recover within a few days, though full return to normal activity may take a little longer.

How often are follow-up visits needed?

Follow-up depends on your child’s condition, but regular visits are important to check progress and long-term results.