Q:

The radionuclide variable that contains the greatest amount of prognostic information in patients with coronary artery disease is:

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The radionuclide variable that contains the greatest amount of prognostic information in patients with coronary artery disease is:


  1. Exercise ejection fraction
  2. Change in regional wall motion from rest to exercise.
  3. Maximal cardiac output during exercise.
  4. Change in heart rate during exercise.

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A. Exercise ejection fraction

DISCUSSION: The exercise ejection fraction is the single most important radionuclide variable relating to subsequent cardiac death or myocardial infarction, and this single variable contains 80% of the prognostic information in the test. 

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