- Infantile / diffuse = preductal from innominate artery to ductus arteriosus
— Etiology: congenital
— Imaging: long segment narrowing
— Clinical: left sided obstructive lesion, neonatal ductal dependent for collateral flow - Adult / focal = ductal / postductal
— Etiology: acquired, due to rubella or neurofibromatosis type 1 in adults
— CXR: 3 sign is prestenotic dilation of ascending aorta / coarctation / post-stenotic dilation of descending aorta, rib notching takes 10 years due to shunting from subclavian artery -> internal thoracic artery -> intercostal arteries -> descending aorta, first 2 ribs spared from notching because they are supplied from costocervical trunk
— UGI: Reverse 3 sign is hypoplastic aortic knob with dilated post stenotic segment
— Clinical: most common form, presents later due to presence of collaterals
Radiology Cases of Coarctation of Aorta
Pediatric Imaging 