Interrupted aortic arch (type B)

Case contributed by Dr Hidayatullah Hamidi

Presentation

3-day-old neonate with respiratory distress.

Patient Data

Age: Neonate
Gender: Female

Interrupted aortic arch, type B: interruption between the left common carotid and left subclavian artery.

aberrant right subclavian artery arising from the descending aorta distal to the origin of left subclavian artery.

The left subclavian artery emanates from the proximal descending aorta which arises from the main pulmonary artery via a patent ductus arteriosus.

Atrial septal defect and membranous ventricular septal defect are seen.

Right atrial and right ventricular dilatation, and larger main pulmonary trunk (16 mm) than the aorta (7.3 mm).

Pulmonary plethora is noted.

All pulmonary veins can be seen draining into the left atrium.

The superior vena cava and inferior vena cava can be seen draining into the right atrium.

Aorta can be seen arising from the left ventricle.

The pulmonary artery can be seen arising from the right ventricle.

Annotated image

Annotated image showing interrupted aortic arch, the PDA, and the dilated pulmonary trunk.

Case Discussion

Type B is the most common type of aortic coarctation occurring in more than 50% of cases.

 

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