CTICasesTetralogy of Fallot with Ductal Origin of the Left Pulmonary Artery
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Imaging findings
CT angiography demonstrates Tetralogy of Fallot characterized by an absent or severely hypoplastic native left pulmonary artery segment. Instead, a very tortuous patent ductus arteriosus arises from the aortic arch to feed the distal left pulmonary artery, providing its primary source of blood flow with only a minimal, incomplete native central pulmonary artery connection.
Key takeaways
In Tetralogy of Fallot, abnormal pulmonary arterial supply can occur, such as a ductal-dependent left pulmonary artery. Recognizing these tortuous patent ductus arteriosus connections is vital for surgical planning, as the left pulmonary artery must be surgically re-established or connected to the main pulmonary confluence during complete repair.
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