Successful Late Recruitment of the Occluded Left Main Coronary Artery After Initial Arterial Switch Operation

Area of Science:

• Pediatric Cardiac Surgery
• Congenital Heart Disease
• Coronary Artery Reconstruction

Background:

• Arterial switch operation (ASO) is a standard procedure for d-transposition of the great arteries.
• Late LMCA occlusion after ASO can lead to severe left ventricular dysfunction.
• Limited surgical options exist for managing LMCA occlusion in infants, carrying high restenosis risks.

Observation:

• A patent conal artery branching from the LMCA near the ostium was identified.
• This conal artery was utilized for collateral flow to the distal LMCA.
• The technique was applied in a two-month-old infant with LMCA occlusion post-ASO.

Findings:

• Successful LMCA recanalization was achieved using the conal artery.
• Complete revascularization was confirmed by postoperative angiography.
• The patient demonstrated improved cardiac function post-procedure.

Implications:

• This technique offers a new surgical approach for late LMCA occlusion in pediatric patients.
• It provides a potentially lower-risk alternative to complex reoperations, especially in small children.
• Successful application in an infant suggests feasibility and efficacy in challenging congenital cases.