Suprasternal

• Demonstrate arch sidedness.
• Demonstrate arch anatomy, looking for evidence of interruption or coarctation.
• If seen, demonstrate origin of pulmonary arteries.
• Interrogate for evidence of a PDA or aortopulmonary collaterals.
• Interrogate descending thoracic aorta with color/spectral Doppler for evidence of obstruction and to assess for flow reversal in the presence of significant truncal regurgitation.