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- associated with hypoplastic left heart syndrome
- ascending aorta smaller than brachiocephalic artery
- blood flows from heart to aorta via pulmonary trunk and persistent ductus. Arch fills retrograde
- normal origin of brachiocephalics
- coronaries arise from ascending aorta
- survival depends on PDA patency
- Norwood operation: converts morphological right ventricle into systemic ventricle, anastomosing pulmonary trunk to ascending aorta
- blood flow to pulmonary arteries maintained through modified Blalock-Taussig shunt
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