Duke Treadmill Score is one of the tools for predicting the risk of
ischemia
Ischemia or ischaemia is a restriction in blood supply to any tissue, muscle group, or organ of the body, causing a shortage of oxygen that is needed for cellular metabolism (to keep tissue alive). Ischemia is generally caused by problems wi ...
or
infarction
Infarction is tissue death (necrosis) due to inadequate blood supply to the affected area. It may be caused by artery blockages, rupture, mechanical compression, or vasoconstriction. The resulting lesion is referred to as an infarct
(from the ...
in the
heart muscle
Cardiac muscle (also called heart muscle, myocardium, cardiomyocytes and cardiac myocytes) is one of three types of vertebrate muscle tissues, with the other two being skeletal muscle and smooth muscle. It is an involuntary, striated muscle tha ...
.
The calculation is done based on the information obtained from an
exercise test
A cardiac stress test (also referred to as a cardiac diagnostic test, cardiopulmonary exercise test, or abbreviated CPX test) is a cardiological test that measures the heart's ability to respond to external stress in a controlled clinical environ ...
by this formula:
:
xercise duration by Bruce protocol">Bruce_protocol.html" ;"title="xercise duration by Bruce protocol">xercise duration by Bruce protocol- [ 5 × (maximal ST elevation or ST depression, 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
Mortality is the state of being mortal, or susceptible to death; the opposite of immortality.
Mortality may also refer to:
* Fish mortality, a parameter used in fisheries population dynamics to account for the loss of fish in a fish stock throug ...
and five-year survival rates respectively for the results of the Duke treadmill score have been reported as:
References
Further reading
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* {{cite journal , doi=10.1056/NEJM199109193251204 , pmid=1875969 , title=Prognostic Value of a Treadmill Exercise Score in Outpatients with Suspected Coronary Artery Disease , journal=New England Journal of Medicine , volume=325 , issue=12 , pages=849–853 , year=1991 , last1=Mark , first1=Daniel B , last2=Shaw , first2=Linda , last3=Harrell , first3=Frank E , last4=Hlatky , first4=Mark A , last5=Lee , first5=Kerry L , last6=Bengtson , first6=James R , last7=McCants , first7=Charles B , last8=Califf , first8=Robert M , last9=Pryor , first9=David B , doi-access=free
Cardiac anatomy
Cardiology
Heart diseases