Duke Treadmill Score (DTS)

Prognostic score for exercise treadmill testing.

Treadmill Performance

Exercise Duration (mins)

min

Max ST Deviation (mm)

Treadmill Angina Index

Cardiovascular Risk

Duke Score10.0

Risk GroupLow Risk

5-Yr Survival99%Estimated

Score Ranges

≥ 5Low Risk

-10 to +4Moderate Risk

≤ -11High Risk

Overview

The Duke Treadmill Score (DTS) is a weighted index that combines treadmill exercise time with ST-segment deviation and exercise-induced angina to predict the risk of coronary artery disease and evaluate prognosis. It is highly validated for the Bruce protocol.

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Pro Tips

Include fractional minutes (e.g., 9 minutes 30 seconds = 9.5).
The score is most applicable to patients with known or suspected coronary artery disease (CAD).
Check for baseline ECG abnormalities (like LBBB) which can make ST interpretation difficult.

Fun Facts

"The standard test used is the Bruce treadmill protocol."
"Angina Index: 0 = none, 1 = non-limiting, 2 = limiting (stop exercise)."
"ST Deviation is the absolute net change (elevation or depression) in mm during or after exercise."
"DTS is a better predictor of 5-year survival than individual exercise parameters alone."

Formula: DTS = Duration - (5 × ST Deviation) - (4 × Angina Index).

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