CTICasesTetralogy of Fallot with Pulmonary Artery Atresia and Major Aortopulmonary Collateral Arteries (MAPCAs)
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Imaging findings
Findings consistent with Tetralogy of Fallot, including a perimembranous ventricular septal defect (VSD), overriding aorta, and a right aortic arch. There is pulmonary artery atresia. Large major aortopulmonary collateral arteries (MAPCAs) arise from the descending aorta and subclavian artery, supplying the pulmonary circulation.
Key takeaways
Tetralogy of Fallot with pulmonary artery atresia results in a lack of direct pulmonary arterial flow, necessitating the development of extensive major aortopulmonary collateral arteries (MAPCAs) from systemic vessels (aorta, subclavian) to provide blood supply to the lungs.
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