What are the anatomic characteristics of the aorta in adults with tetralogy of Fallot (TOF)?

Updated: Nov 13, 2018
  • Author: Shabir Bhimji, MD, PhD; Chief Editor: Yasmine S Ali, MD, FACC, FACP, MSCI  more...
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Answer

The aorta in patients with tetralogy of Fallot is hugely dilated and overrides the diminutive pulmonary artery.  In about 25% of cases, the aorta arises from a right-sided aortic arch. Because of this feature and overriding of the septum, about 50% of the blood flow from the aorta arises from the RV via the large perimembranous VSD.


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