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 | Dobutamine
echo |
Correct
The answer lies in
the post-test probability after the tests and whether they are
different enough to make one test preferable to the other. The
post-test probabilities after a positive result aren't different
enough to change decisions about further testing. However, the
post-test probability after a negative stress ECG (0.12) is high
enough to strongly consider further treatment with a beta blocker
and to consider further testing if the pain continues to be troubling.
Thus, the dobutamine echo is preferred in this situation (but
not necessarily others) because its LR- is lower (owing to higher
sensitivity).
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