Pulmonary artery interventions after the arterial switch operation: Unique and significant risks.

Area of Science:

• Cardiology
• Pediatric Cardiac Surgery
• Interventional Cardiology

Background:

• Arterial switch operation (ASO) for transposition of the great arteries yields excellent outcomes.
• The LeCompte maneuver during ASO may lead to pulmonary artery stenosis.
• Atypical complications like aorto-pulmonary fistula and coronary compression can occur after pulmonary artery stenting post-ASO.

Purpose of the Study:

• To review adverse events associated with pulmonary artery interventions in patients post-ASO.
• To evaluate the risks and outcomes of pulmonary artery stenting in this patient population.

Main Methods:

• Retrospective review of catheterizations in patients who underwent ASO.
• Analysis of 47 patients over a 10-year period, focusing on diagnostic and interventional procedures.
• Detailed examination of adverse events, particularly in patients undergoing pulmonary artery angioplasty and stenting.

Main Results:

• Five major adverse events (14%) occurred in 29 patients undergoing 37 interventions, including aorto-pulmonary fistulae and coronary artery compression.
• Six procedures (16%) were aborted due to high risk of adverse events.
• Stent implantation or redilation was associated with significant complications.

Conclusions:

• Percutaneous intervention for post-ASO pulmonary artery stenosis is high-risk and requires cautious application.
• Thorough pre-procedural evaluation of coronary arteries is essential due to potential proximity to stenosis.
• Risks of stent fracture and aorto-pulmonary fistula necessitate consideration of reinforced covered stents.