What is the definition or description of: stress test?

Cardiac test: A stress test is a cardiac test which can include walking on a treadmill and monitoring your heart while you are walking. They can also inject you with a nuclear material and do a more comprehensive scan on your heart to check for blockage. They can also do a chemical stress test which omits the need to walk on the treadmill.

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 these 1995 in favor of better options.