Revision C CASE B-9
2060290-201
Miscellaneous: Duke Treadmill Score
Duke Treadmill Score
1. The system automatically generates the Duke Treadmill Score using
the following standard computation.
Note
Maximum ST deviation refers to the amount of exercise-induced
ST segment deviation, i.e., the largest elevation or depression
after baseline ST levels have been subtracted.
The calculated ST deviation value depends on the J+x setting
(default: J+60 ms). High heart rates may affect the accuracy of
this value.
The calculated ST deviation does not differentiate between
horizontal, downsloping and upsloping ST segments, nor is Q
wave significance considered.
Note
The user must verify and possibly correct the system-calculated
value.
2. Duke Treadmill Score Risk Categories are assigned according to the
following ranges:
> (+5) low
(-10 to +4.9) intermediate
< (-10) high
3. Prognosis percentages for 5-year survival and average annual
mortality are calculated from the nomogram of the prognostic
relations embodied in the Duke Treadmill Score.
4. Exercise time using the Bruce Protocol is standard. Equivalent
measures in multiples of resting oxygen consumption (METS) from
an alternative protocol can be used.
Duke
Treadmill
Score
Angina-Index 0 = none, 1 = non-limiting, 2 = limiting
(Bruce)
Exercise Time
(minutes)
=
–
5
maximum
ST deviation
(mm)
4 (Angina Index)
–
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