What is a treadmill stress test used to detect?

Diagnosis. To diagnosis underlying coronary artery disease in one with suggestive symptoms or to evaluate the efficacy of medical therapy in one with known coronary artery disease.
ForAdvancedDisease. Promoted for detecting artery disease, but misses most disease; arteries expand, not narrow. ~75%, or more, narrowing required before stress tests, all forms, begin to detect any abnormalities. Nuclear (more expensive & person radiated) promoted as more sensitive; for all I have seen, a well done ekg exercise stress more sensitive & accurate. I quit doing stress tests 1995; better client options.