Coarctation of the Aorta

Renal ultrasound scanning. A, Renal ultrasound scan with Doppler demonstrating a tardus-parvus waveform in a 6-year-old boy. B, Renal ultrasound scan in a healthy age-matched control subject.

Chest radiograph reveals bilateral rib notching (examples noted by white arrows).

Three-dimensional reconstruction of gadolinium-enhanced magnetic resonance angiogram demonstrating severe coarctation of the aortic isthmus, approximately 2 to 3 mm in diameter. Note the extensive collateral vessels to the descending aorta.