Duke Treadmill Score Calculator


Duke Treadmill Score
Angina index

Welcome to the rollercoaster ride of Duke Treadmill Score calculation! It’s a bit like algebra, but with a twist of fun (and its super important for your health)!

Introduction and Formula

The Duke Treadmill Score (DTS) is a scoring system used to predict coronary heart disease and mortality. Here is the magic formula:

DTS = ExerciseTime - (5 x MaximalSTSegmentDeviation) - (4 x TreadmillAnginaIndex)

Duke Treadmill Score Categories

Here’s a handy table to decode the Da Vinci code of Duke Treadmill Score:

DTS Range Category Risk
> +5 Low Risk 1%
-10 to +4 Moderate Risk 5%
< -11 High Risk 25%

Calculation Examples

Meet John and Jane Doe, our imaginary patients. Let’s calculate their Duke Treadmill Scores!

Person Exercise Time (mins) Max ST Deviation (mm) Angina Index DTS Interpretation
John Doe 10 2 0 0 Low Risk
Jane Doe 8 3 1 -7 Moderate Risk

Calculation Methods

Like roads to Rome, there are several ways to calculate DTS. Here are a couple:

Method Advantage Disadvantage Accuracy
Traditional Treadmill Accessible Time-consuming High
Alternate Treadmill Faster Less Accessible Moderate

Evolution of DTS

From Steve Jobs’ garage to worldwide adoption, here’s how DTS has evolved:

Year Development
1970 Concept Introduced
1980 Formula Finalized
1990 Widespread Adoption

Limitations of DTS

Like every superhero, DTS has its weaknesses:

  1. Subjectivity: Interpretation can vary between observers.
  2. Inaccuracy: Not 100% accurate for all populations.

Alternative Methods

When DTS doesn’t do the trick, there are other ways to measure heart health:

Method Pros Cons
Bruce Protocol Widely Used Less Accurate
Balke Protocol More Accurate Less Known


  1. What is the Duke Treadmill Score? It’s a scoring system used to predict coronary heart disease.
  2. How is the DTS calculated? It’s calculated using exercise time, maximal ST segment deviation, and the treadmill angina index.
  3. What does the Angina Index mean in DTS? Angina Index is a measure of chest pain during exercise.
  4. Why is DTS important? DTS is used to assess the risk of heart disease and mortality.
  5. How accurate is the Duke Treadmill Score? While it’s a useful tool, DTS is not 100% accurate and results can vary.
  6. What is considered a good Duke Treadmill Score? A score greater than +5 is considered low risk.
  7. Can I calculate DTS at home? DTS should be calculated under medical supervision as it involves a treadmill exercise test.
  8. What are the alternatives to DTS? Alternatives include the Bruce Protocol and Balke Protocol.
  9. What is the Bruce Protocol? It’s another method to evaluate cardiac function, but it’s considered less accurate than DTS.
  10. What is the Balke Protocol? It’s an alternative to DTS and is considered more accurate but is less well-known.


  1. CDC – Heart Disease Facts – Find reliable statistics about heart disease in the U.S.
  2. NIH – Coronary Heart Disease – Learn in-depth about coronary heart disease from a trusted government source.