Combined Use of a Modified Microvascular Plug Flow Restrictor and Right Ventricular Outflow Tract Stenting

Area of Science:

• Cardiovascular Physiology
• Pediatric Cardiology
• Interventional Cardiology

Background:

• Maintaining the balance between pulmonary and systemic blood flow is critical in managing congenital cardiovascular shunts.
• Tetralogy of Fallot with pulmonary atresia presents complex challenges in neonatal cardiac care.

Observation:

• A neonate diagnosed with 22q11.2 deletion syndrome and severe Tetralogy of Fallot with pulmonary atresia required intervention for abnormal pulmonary blood flow.
• An isolated left pulmonary artery from the aorta and major aortopulmonary collateral arteries complicated the pulmonary circulation.
• A modified microvascular plug (mMVP) was deployed in the left pulmonary artery to restrict excessive flow prior to definitive surgery.

Findings:

• The mMVP effectively modulated pulmonary blood flow, demonstrating its potential as a pulmonary flow restrictor.
• Case reports indicate that mMVP is a promising technique for managing pulmonary blood flow in high-risk neonates.

Implications:

• The mMVP offers a viable strategy for pulmonary blood flow modulation in neonates awaiting surgical correction of complex congenital heart defects.
• This interventional approach may reduce risks associated with immediate surgical intervention in critically ill neonates.