CTICasesUncorrected Type 1 Truncus Arteriosus
Imaging findings
Cardiac MRI and chest CT in a 25-year-old patient show a large ventricular septal defect and a single, massive outflow tract arising from both ventricles. This single truncus trunk gives rise to a single main pulmonary branch from its posterolaterally-directed wall, which then divides into the left and right pulmonary arteries, characteristic of a type 1 truncus arteriosus.
Key takeaways
Truncus arteriosus is a rare congenital cardiac anomaly representing a single great vessel that supplies systemic, pulmonary, and coronary circulation. Although most cases are diagnosed and surgically corrected in infancy, survival into adulthood without intervention can occasionally occur, often presenting with symptoms of pulmonary hypertension and shunt reversal.
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