How could it be possible to get angina from normal coronary arteries in cardiac x syndrome?

Now I'm doing a rotation in cardiology. I've come across about Cardiac X syndrome, but I don't really get what it is. A book said "it is a form of microvascular angina but occurs in normal coronary arteries". Unfortunately, no-where in the book is it explained in depth. So I have a few questions:

  1. Is there any proper definition and how to diagnose it?
  2. What is the pathophysiology than can explain this syndrome?
  3. Does it something related to metabolic x syndrome?

Any takers?

Authored By malek ahmad on Saturday 10th November 2012