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Figure 2 :(a) Suprasternal long axis view of the aortic arch performed 12 hours later showed the juxtaductal segment was severely narrowed (arrow) after ductal closure Figure 2b: Continuous wave Doppler interrogation across the arch from suprasternal view after ductal closure showing systolic gradient 64 mm Hg, with diastolic spilling (continuous flow). Tr arch-transverse arch, Dao-descending aorta

Figure 2 :(a) Suprasternal long axis view of the aortic arch performed 12 hours later showed the juxtaductal segment was severely narrowed (arrow) after ductal closure
Figure 2b: Continuous wave Doppler interrogation across the arch from suprasternal view after ductal closure showing systolic gradient 64 mm Hg, with diastolic spilling (continuous flow). Tr arch-transverse arch, Dao-descending aorta