My understanding is the stress test will detect blockages starting at 70%. So a good tool but could miss some pretty significant stuff too. That's why I'm wondering/hoping if this CT scan with dye contrast might actually be more thorough in terms of what it reveals. But definitely would like to do the stress test too. As it is, I run 4-5x a week and I don't *think* I notice any issues. (Although I started taking the statin last Thursday and right away on Friday my 3.2 mile time went up 4 minutes -- felt a lot more sluggish through the whole thing)