It is true hipernating** or stunned cells can be revived (sometimes with an adequate supply ofblood/oxygen) and the
condition is reversed, but in the
context of the
examination and the
comment that there is no evidence of ischemia at rest , etc. probably means that, in a stress test, it was shown that the person taking the test has some narrowing of the coronary arteries that happens during exercise, but will go away when they rest. In other words, it's reversible.