Transposition of the Great Arteries

Area of Science:

• Pediatric Cardiology
• Congenital Heart Disease
• Cardiac Surgery

Background:

• Transposition of the great arteries (TGA) is a critical congenital heart defect necessitating prompt medical and surgical intervention.
• Early diagnosis and management are crucial for survival and improved outcomes in neonates with TGA.

Purpose of the Study:

• To outline the diagnostic and therapeutic strategies for Transposition of the great arteries.
• To review the long-term outcomes and potential complications following surgical repair of TGA, including both intra-atrial repairs and the arterial switch procedure.

Main Methods:

• Diagnostic workup primarily involves cross-sectional echocardiography.
• Initial management includes prostaglandin infusion for ductal patency and balloon atrial septostomy.
• Surgical correction options discussed are the arterial switch procedure and historical intra-atrial repairs (Mustard and Senning operations).

Main Results:

• The arterial switch procedure is the current standard of care for simple TGA.
• Survivors of Mustard/Senning operations face risks of arrhythmia, baffle stenosis, tricuspid valve dysfunction, and systemic ventricular dysfunction.
• Survivors of arterial switch have rare late deaths, primarily linked to reoperation, with uncommon significant arrhythmias, though coronary circulation long-term fate is under investigation.

Conclusions:

• Continuous long-term surveillance is vital for all TGA survivors to monitor for late-developing complications.
• While arterial switch offers better outcomes, potential issues like coronary arterial obstruction warrant ongoing research and monitoring.
• Understanding late sequelae is essential for optimizing lifelong care pathways for individuals with repaired TGA.