Intramural left main coronary artery unexpectedly encountered during aortic root replacement

Area of Science:

• Cardiovascular Surgery
• Congenital Heart Disease
• Anatomical Variations

Background:

• Aortic root replacement is a complex procedure, particularly in patients with congenital heart defects like truncus arteriosus.
• Intramural coronary arteries, where the vessel courses within the aortic wall, pose unique surgical challenges.
• Accurate coronary artery anatomy is critical for successful outcomes in aortic root surgery.

Observation:

• An unexpected intramural left main coronary artery was identified during aortic root replacement.
• The coronary artery orifice was severely limited, necessitating a modified surgical approach.
• This anatomical anomaly was encountered in a patient with truncus arteriosus.

Findings:

• A novel technique of unroofing the intramural portion of the left main coronary artery was successfully performed.
• The unroofed coronary artery was then reimplanted as a button.
• This represents the first reported instance of unroofing an intramural coronary artery prior to reimplantation in this context.

Implications:

• This technique offers a potential solution for managing intramural coronary arteries during aortic root replacement.
• It expands the surgical armamentarium for complex congenital heart disease cases.
• Further studies are warranted to evaluate the long-term efficacy and safety of this approach.