Reoperation for neoaortic root pathology after the arterial switch operation

Area of Science:

• Cardiovascular Surgery
• Pediatric Cardiology
• Congenital Heart Disease

Background:

• Arterial switch operation (ASO) is a standard treatment for transposition of the great arteries (TGA).
• Neoaortic root pathology, including dilatation and regurgitation, can develop years after ASO.
• Long-term outcomes and reintervention rates for neoaortic root pathology after ASO require further evaluation.

Purpose of the Study:

• To assess the incidence and outcomes of surgical interventions for neoaortic root pathology following ASO in TGA patients.
• To identify potential risk factors for reoperation.
• To analyze the technical challenges and results of redo neoaortic surgery.

Main Methods:

• Retrospective review of 12 patients who underwent reoperation for neoaortic root pathology after ASO between 1996 and 2013.
• Recorded maximal aortic sinus and annulus diameter Z-scores.
• Analyzed original diagnoses, age at ASO, and presence of VSD or complex TGA as potential risk factors.

Main Results:

• Fifteen root operations were performed on 12 patients (median age 18.0 years) for dilatation and/or regurgitation.
• Median aortic root Z-score at reoperation was 6.33.
• Procedures included Bentall, aortic valve replacement, and valve plasty; no mortality occurred, but technical difficulties were noted. Valve-sparing surgery was not feasible.

Conclusions:

• Neoaortic root pathology requiring surgery is a potential long-term complication after ASO for TGA.
• Reoperation for neoaortic root pathology can be performed with low risk, despite technical challenges.
• No specific risk factors were identified for reoperation, emphasizing the need for long-term surveillance.