CTICasesCongenitally Corrected Transposition of the Great Arteries
Imaging findings
Chest CT shows congenitally corrected transposition of the great arteries (ccTGA) with L-transposition of the aorta, situated anteriorly and to the left of the pulmonary artery. There is AV discordance with a morphologic right ventricle supplying the systemic circulation. Left main bronchus bronchomalacia is present, compressed by the malpositioned pulmonary artery, requiring a stent. A duplicated superior vena cava is also noted.
Key takeaways
Congenitally corrected transposition of the great arteries (ccTGA) is characterized by both ventriculoarterial and atrioventricular discordance, which functionally corrects the blood flow. However, the morphologic right ventricle serves as the systemic pump and is prone to eventual failure. Complications include conduction abnormalities, tricuspid regurgitation, duplicated SVC, and airway compression/bronchomalacia due to the abnormal position of the great vessels.
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