Best guess percentage wise: are nst's better at confirming angina or ruling it out. i think the test is more accurate one way or the other?

Good test: Angina, which simply refers to chest pain but has commonly become synonymous with ischemic coronary artery disease can be suspected by symptoms, suggested by nuclear stress tests and firmly diagnosed by cardiac catheterization. Consult your doctor for the best course of action to take if you are experiencing suspicious chest pains.

Ruling it out: Like any test, it may have some false results. In low-risk patients the % of false (+) are higher, whereas in high-risk patients the % of false (-) increases. It is most beneficial in intermediate-risk patients--where they are helpful to rule out ischemia caused by coronary artery disease. In my practice, oftentimes a detailed history and physical is sufficient to identify patients at highest risk.