Figure 1: (a) Color flow Doppler imaging echocardiogram on the suprasternal longitudinal view showing coarcted segment of aorta with turbulence (arrow) in the descending aorta. (b) Continuous wave Doppler flow echocardiography demonstrating the coarctation gradient with a peak flow velocity in the descending aorta of 3.8 m/s which corresponds to a maximal gradient of 58 mmHg. (c) The two-dimensional echocardiogram, with color flow Doppler, recorded from the parasternal short-axis view, shows blood flow through a patent ductus arteriosus (arrow).