Had an adenosine nuclear stress test. Showed decreased tracer concentration on front wall. I asked Doc how bad it was. He said that you cant tell extent or severity from this test because it doesnt show quantitative results, thus I'm having a cath as soon as my excisional breast biopsy is done next week. But I was reading that Quantitative perfusion SPECT images can indicate mild, moderate or severe results. Is this a different test? And if so, how come I didnt just have that test? I am concerned over waiting for cath. I had some chest pain upon exercise, (more than usual), so that is why stress test done before my biopsy could be done. Does anybody know about these tests for CAD. I am embarassed to call Dr again. Every time I learn a little more, I have more questions. It would be great to get some feedback from this forum. I'm sure I will be bugging my Doc some more. He is really patient and so nice. He programmed his cell into my cell phone, but I should get as much info as I can before I can speak intelligently to him. Thanks for reading.