Pulmonary valve repair and replacement

Pulmonary valve repair and pulmonary valve replacement are procedures to treat a diseased or damaged pulmonary valve.

The pulmonary valve is one of four valves that control blood flow in the heart. It's between the lower right heart chamber (right ventricle) and the artery that delivers blood to the lungs (pulmonary artery).

A diseased or damaged pulmonary valve can interrupt blood flow from the heart to the lungs. Pulmonary valve repair and pulmonary valve replacement can help improve blood flow and reduce symptoms of heart valve disease.

Pulmonary valve repair and pulmonary valve replacement are done to treat pulmonary valve disease.

Pulmonary valve disease is a condition in which the lung (pulmonary) valve doesn't work properly. It may occur on its own or with other heart conditions present at birth (congenital heart defects), such as tetralogy of Fallot.

Types of pulmonary valve disease that may require treatment with pulmonary valve repair or pulmonary valve replacement include:

• Pulmonary valve regurgitation. A leaky pulmonary valve allows blood to flow backward into the heart (pulmonary valve regurgitation) rather than directly to the lungs for oxygen.
• Pulmonary valve stenosis. The pulmonary valve is thickened or blocked. It's hard for the valve to open properly. The heart must work harder to pump blood into the pulmonary artery and to the lungs.
• Pulmonary atresia. This is a congenital heart defect in which a child is born without a well-defined pulmonary valve. In pulmonary atresia, blood can't flow from the right lower heart chamber into the lung artery. The only blood flow to the lungs is through an open passageway between the pulmonary artery and the body's main artery (aorta).

The decision to repair or replace a damaged pulmonary valve depends on many things, including:

• The severity (stage) of pulmonary valve disease
• Symptoms
• Age and overall health
• Whether or not the condition is getting worse
• Whether surgery is needed to correct another valve or heart condition

Pulmonary valve surgery may be done at the same time as other heart valve surgeries. In general, surgeons recommend pulmonary valve repair when possible, as it saves the heart valve and improves heart function.

During the procedure

When you arrive for surgery, a care provider will insert an IV into your forearm or hand. Fluids and medicines can be given through the IV. A care provider may shave off any hair at the location where the procedure will take place.

For most pulmonary valve repair and replacement procedures, you'll receive medications (general anesthesia) that put you in a sleep-like state so you won't feel any pain during the surgery.

You may be connected to a heart-lung bypass machine. The machine keeps blood moving through the body during the heart valve surgery.

Pulmonary valve repair

Pulmonary valve repair is usually done with open-heart surgery and by opening of the chest bone (sternotomy). Surgeons wire the bone back together after the procedure to prevent movement and aid in healing.

Pulmonary valve repair involves:

• Separating valve flaps that have fused
• Creating one or more new valve leaflets from your own heart tissues
• Removing any patches that may have been placed during earlier congenital heart disease surgeries and bringing the pulmonary valve leaflets together to create a working valve
• Reshaping or removing tissue to allow the valve to close more tightly
• Tightening or reinforcing the ring around the valve (annulus)

Minimally invasive pulmonary valve repair

If the pulmonary valve can't fully open due to pulmonary valve stenosis, a less invasive procedure called balloon valvuloplasty may be used to repair the valve. Minimally invasive heart valve surgery typically involves smaller incisions and a shorter hospital stay than traditional open-heart surgery.

During balloon valvuloplasty, a surgeon inserts a thin, hollow tube (catheter) into a blood vessel, usually in the groin, and threads it to the heart. A balloon on the tip of the catheter is inflated, which widens the narrowed pulmonary valve. The balloon is deflated and removed.

Balloon valvuloplasty is often used to treat infants and children with pulmonary valve stenosis. However, the valve tends to narrow again in adults who have had the procedure. Additional procedures may be needed to treat the narrowed valve over time.

Pulmonary valve replacement

If the pulmonary valve can't be repaired, surgery may be needed to replace the valve. In this procedure, a surgeon removes the pulmonary valve and replaces it with a mechanical valve or a valve made from cow, pig or human heart tissue (biological tissue valve).

If you have a mechanical valve, you'll need to take blood-thinning medications for life to prevent blood clots. Biological valves often eventually need to be replaced, as they break down over time. Together, you and your health care providers will discuss the risks and benefits of each type of valve to choose the one that's best for you.

Pulmonary valve replacement may be done using open-heart surgery or minimally invasive methods, which involve smaller incisions than those used in open-heart surgery.

Minimally invasive pulmonary valve replacement

Minimally invasive pulmonary valve replacement helps reduce the number of open-heart surgeries over a person's lifetime. The most common type of minimally invasive pulmonary valve replacement is transcatheter pulmonary valve replacement, also called percutaneous pulmonary valve replacement.

In this type of pulmonary valve replacement, the surgeon inserts a thin, flexible tube (catheter) into a large blood vessel in the groin or chest and guides it to the heart. A replacement pulmonary valve goes through the catheter. A balloon on the tip of the catheter expands to press the new pulmonary valve into place.

A transcatheter procedure also may be used to insert a new pulmonary valve in a previously replaced valve that's now failing. This is called a valve-in-valve procedure.

After the procedure

After open-heart pulmonary valve repair or pulmonary valve replacement, you'll generally spend a day or more in the intensive care unit (ICU).

You'll be given fluids, nutrition and medications through intravenous (IV) lines. Other tubes will drain urine from your bladder and drain fluid and blood from your heart and chest. You may be given oxygen.

After the ICU, you'll be moved to a regular hospital room for a few days. The time you spend in the ICU and hospital can vary, depending on your condition and procedure.

During your hospital stay, your treatment team will:

• Watch for signs of infection in your incision sites
• Periodically check your blood pressure, breathing and heart rate
• Work with you to manage any pain you have after surgery
• Instruct you to walk regularly to gradually increase your activity and do breathing exercises as you recover

You'll receive instructions to follow during your recovery, such as watching for signs of infection in your incisions, properly caring for incisions, taking medications, and managing pain and other side effects after your surgery.

Recovery time depends on the specific procedure, your overall health before the procedure and any complications.