Pulmonary Artery Banding for Infant Heart Failure in Alström

For most infants with Alström-related dilated cardiomyopathy, standard medical therapy with ACE inhibitors, beta-blockers, and diuretics is enough to stabilize and recover heart function. For a smaller group with severe heart failure that doesn't respond adequately to medications, surgical interventions like pulmonary artery banding have been used. This article explains what pulmonary artery banding is, when it's considered in Alström, and what outcomes have been reported.

Pulmonary artery banding (PA banding) is a surgical procedure in which a band is placed around the main pulmonary artery — the vessel that carries blood from the right ventricle to the lungs. The band partially restricts blood flow, increasing the workload on the right ventricle.

The technique was originally developed for congenital heart defects with too much pulmonary blood flow, where banding protects the lungs and balances the circulation. More recently, it's been explored as a way to "rest" or condition a failing left ventricle in some forms of dilated cardiomyopathy in young children.¹

The mechanism is somewhat counterintuitive: by restricting flow to the lungs, PA banding shifts more of the work onto the right ventricle. Over time, the increased workload causes the right ventricle to thicken (hypertrophy), and the relative position and shape of the interventricular septum changes. This can:

• Reduce the dilation of the left ventricle
• Improve the geometry of the heart
• Allow the failing left ventricle to recover function
• Bridge to recovery without requiring transplant

In selected children with rapidly progressing DCM, PA banding has been associated with significant improvement in left ventricular function over months to years.²

For infants with Alström-related cardiomyopathy, PA banding has been described in selected cases of severe heart failure that doesn't respond adequately to medical therapy.³ Considerations include:

• Severity of the heart failure
• Age and size of the infant
• Response to medical management
• Availability of specialized surgical expertise
• Center experience with the procedure
• Family discussion of risks and potential benefits

PA banding is not standard for all Alström-related infant cardiomyopathy — most babies recover without it. It's an option to discuss when standard therapy isn't enough.

PA banding is performed under general anesthesia by a pediatric cardiac surgeon. Through a sternotomy or limited incision, a band of synthetic material is placed around the main pulmonary artery and tightened to a specific narrowing. The procedure is technically demanding because the degree of constriction must balance restricting flow against not over-restricting it.

Recovery typically involves:

• Several days in the cardiac ICU
• Continued heart-failure medications
• Frequent echocardiograms to assess response
• Hospital stay of 1–3 weeks

Reports of PA banding in pediatric DCM, including in some Alström patients, suggest:

• Many children show meaningful improvement in left ventricular function
• Some can have the band removed or loosened later when the heart recovers
• Some require continued medical therapy long-term
• The procedure can serve as an alternative to or bridge from transplant in selected cases

Outcomes vary by patient, severity, and center experience.

PA banding for DCM is offered at a small number of pediatric cardiac surgical centers with experience in this specific application. Families considering it should:

• Be referred to a center with documented experience
• Have a thorough multidisciplinary discussion
• Understand it's not a routine intervention for Alström

For severe infant cardiomyopathy not responding to medications, other options include:

• Continued aggressive medical therapy
• Mechanical circulatory support (ECMO, ventricular assist devices) as bridge to recovery or transplant
• Heart transplant evaluation for selected patients

The choice among these depends on the specific clinical situation, center capabilities, and family preferences.

• Dilated Cardiomyopathy in Infants With Alström Syndrome
• Heart Medications for Alström Syndrome
• Heart Transplant in Alström Syndrome
• Could My Baby's Heart Failure Be Alström Syndrome?

April 30, 2026.