• Source: Duke Treadmill Score

Duke Treadmill Score is one of the tools for predicting the risk of ischemia or infarction in the heart muscle. The calculation is done based on the information obtained from an exercise test by this formula:

[exercise duration by Bruce protocol] - [ 5 × (maximal ST elevation or depression)] - [4 × (treadmill angina index)]
In which, the exercise duration is written in "minutes" and the ST changes in "millimetres". Angina index will be zero if no pain appears during the exercise, one if the pain is limited to the exercise period but the patient can continue the exercise (typical angina), and two if a limiting pain occurs which is a reason to stop the exercise test.
Duke treadmill scores typically range from -25 (highest risk) to +15 (lowest risk). One-year mortality and five-year survival rates respectively for the results of the Duke treadmill score have been reported as:

less or equal to -11: 5.25% / 65%
4 to -10: 1.25% / 90%
more or equal to 5: 0.25% / 97%





References






Further reading


Kwok, Jennifer M.F; Miller, Todd D; Hodge, David O; Gibbons, Raymond J (2002). "Prognostic value of the Duke treadmill score in the elderly". Journal of the American College of Cardiology. 39 (9): 1475–1481. doi:10.1016/S0735-1097(02)01769-2. PMID 11985910.
Gulati, Martha; Arnsdorf, Morton F; Shaw, Leslee J; Pandey, Dilip K; Thisted, Ronald A; Lauderdale, Diane S; Wicklund, Roxanne H; Al-Hani, Arfan J; Black, Henry R (2005). "Prognostic Value of the Duke Treadmill Score in Asymptomatic Women". The American Journal of Cardiology. 96 (3): 369–375. doi:10.1016/j.amjcard.2005.03.078. PMID 16054460.
Ho, Kheng-Thye; Miller, Todd D; Holmes, David R; Hodge, David O; Gibbons, Raymond J (1999). "Long-term prognostic value of duke treadmill score and exercise thallium-201 imaging performed one to three years after percutaneous transluminal coronary angioplasty". The American Journal of Cardiology. 84 (11): 1323–1327. doi:10.1016/S0002-9149(99)00565-2. PMID 10614798.
Liao, L; Smith Wt, 4th; Tuttle, R. H; Shaw, L. K; Coleman, R. E; Borges-Neto, S (2005). "Prediction of death and nonfatal myocardial infarction in high-risk patients: A comparison between the Duke treadmill score, peak exercise radionuclide angiography, and SPECT perfusion imaging". Journal of Nuclear Medicine. 46 (1): 5–11. PMID 15632026.{{cite journal}}: CS1 maint: numeric names: authors list (link)
Lakkireddy, Dhanunjaya R; Bhakkad, Jyothi; Korlakunta, Hema L; Ryschon, Kay; Shen, Xuedong; Mooss, Aryan N; Mohiuddin, Syed M (2005). "Prognostic value of the Duke Treadmill Score in diabetic patients". American Heart Journal. 150 (3): 516–521. doi:10.1016/j.ahj.2004.09.058. PMID 16169334.
Peteiro, Jesús; Monserrrat, Lorenzo; Piñeiro, Miriam; Calviño, Ramon; Vazquez, Jose Manuel; Mariñas, Javier; Castro-Beiras, Alfonso (2006). "Comparison of exercise echocardiography and the Duke treadmill score for risk stratification in patients with known or suspected coronary artery disease and normal resting electrocardiogram". American Heart Journal. 151 (6): 1324.e1–1324.e10. doi:10.1016/j.ahj.2006.03.015. PMID 16781248.
Youn, Ho-Joong; Park, Chul-Soo; Moon, Keon-Woong; Oh, Yong-Seok; Chung, Wook-Sung; Kim, Jae-Hyung; Choi, Kyu-Bo; Hong, Soon-Jo (2005). "Relation between Duke treadmill score and coronary flow reserve using transesophageal Doppler echocardiography in patients with microvascular angina". International Journal of Cardiology. 98 (3): 403–408. doi:10.1016/j.ijcard.2003.11.045. PMID 15708171.
Sadrzadeh Rafie, Amir H; Dewey, Frederick E; Sungar, Gannon W; Ashley, Euan A; Hadley, David; Myers, Jonathan; Froelicher, Victor F (2008). "Age and Double Product (Systolic Blood Pressure × Heart Rate) Reserve-Adjusted Modification of the Duke Treadmill Score Nomogram in Men". The American Journal of Cardiology. 102 (10): 1407–1412. doi:10.1016/j.amjcard.2008.07.020. PMID 18993164.
Mark, Daniel B; Shaw, Linda; Harrell, Frank E; Hlatky, Mark A; Lee, Kerry L; Bengtson, James R; McCants, Charles B; Califf, Robert M; Pryor, David B (1991). "Prognostic Value of a Treadmill Exercise Score in Outpatients with Suspected Coronary Artery Disease". New England Journal of Medicine. 325 (12): 849–853. doi:10.1056/NEJM199109193251204. PMID 1875969.

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