fig8

Figure 8. Selected video frames from Doppler recordings of the aortic arch demonstrating an increase in the peak Doppler velocity from the proximal aortic segment (A) to a segment below the site of aortic coarctation (B). Also note that there is diastolic extension of the Doppler flow signal (B); this would indicate that the aortic coarctation is of severe degree. Reproduced from Ref.^[10].