How are the results of myocardial perfusion imaging interpreted?

Updated: Nov 20, 2018
  • Author: Richard S Krause, MD; Chief Editor: Barry E Brenner, MD, PhD, FACEP  more...
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Answer

Answer

A positive myocardial perfusion study is one that demonstrates reversible ischemia. Information on the size of the perfusion defect has additional prognostic value. A manual or automated scoring system may be used as well. These scoring systems have been validated and correlate with cardiac mortality. The results of myocardial perfusion imaging (MPI) provide prognostic value independent of the treadmill electrocardiographic (ECG) results.

Computer software with the capacity to perform regional quantitative assessment of radionuclide concentration appears to improve diagnostic accuracy over conventional perfusion imaging assessment. Use of appropriate software can also reduce the radiation dose. [15]


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