Wednesday, January 20, 2010

Difference between Nuclear Stress Test and Treadmill Stress Test

Nuclear stress test, also referred as cardiolyte, or tallium or Adenosine Test is normally done in conjunction with an exercise stress test on a treadmill, but can also be performed using medicines such as adenosine and dipyridamole that effectively simulate the effects of exercise on the heart.

With the help of a cardiac nuclear stress imaging, it can determine whether coronary artery stenoses (blockages) are so severe as to limit blood flow to heart muscle when it needs it most during physical activity. Moreover, nuclear imaging allows a determination of the heart’s pumping function (ejection fraction).

On the other hand, Treadmill stress test is a type of medical test that indirectly reflects arterial blood flow to the heart during physical exercise. When compared to blood flow during rest, this test reflects imbalances of blood flow to the heart's left ventricular muscle tissue which is the part of the heart that performs the greatest amount of work pumping blood. It is usually done for:
*Patients with symptoms or signs that are indicative of coronary artery diseases (CAD).

*To evaluate exercise tolerance to people who have unexplained fatigue and shortness of breath.

*To evaluate blood pressure response to exercise in persons with borderline hypertension.

source: mdinfo

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