Why is MRI the gold standard for assessing tetralogy of Fallot (TOF) in adults?

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

MRI has become the gold standard for assessing the RV function and size, as well as for quantifying the pulmonary regurgitant volume. When a problem with the pulmonary valve is suspected, MRI is the first test of choice. This imaging modality can map the velocity of pulmonary regurgitation and provides good delineation of the aorta size as well as assessment of the pulmonary arteries, the status of the RVOT, and the presence of VSDs and/or RV hypertrophy. [5]  MRI can also measure intracardiac pressures, gradients, and blood flows.

MRI is quite sensitive at detecting branch pulmonary artery stenosis, which may be contributing to the increasing pulmonary valve insufficiency and the formation of aortopulmonary collaterals. These findings are more common in those with tetralogy of Fallot who have pulmonary atresia. [23, 24]


Did this answer your question?
Additional feedback? (Optional)
Thank you for your feedback!