What is the role of radionuclide imaging in the workup of aortic regurgitation (AR)?

Updated: Nov 19, 2018
  • Author: Stanley S Wang, JD, MD, MPH; Chief Editor: Terrence X O'Brien, MD, MS, FACC  more...
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Answer

Radionuclide imaging may provide complementary clinical information, including the AR regurgitant fraction and the LV/right ventricular (RV) stroke volume ratio. In the absence of mitral regurgitation and tricuspid regurgitation, an LV/RV stroke volume ratio of 2.5 or more denotes severe aortic regurgitation.

Demonstration of a fall in the EF with exercise is one of the most important indications for surgery in patients who are asymptomatic.


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