Hi Greg,
I also agree that a person with MM can have good blood flow on a SPECT. The collateral vessels around a blockage can supply the flow temporarily and may even save your life until surgery restores the proper blood flow, but it’s as Trina said, you are still prone to a stroke as long as those MM vessels exist and you do not have the surgery, because the collateral vessels are abnormal and weak and therefore can cause a stroke.
Greg-NJ1 wrote on May 27th, 2005 at 6:24pm:I had several episodes of diziness, blurred vision, tingling in the face, and numbness in my right arm and leg. The two major episodes lasted for several days each (minus the numbness which would come and go).
I’m not trying to frighten you, but from what you’ve just described, those are classic signs of TIA’s. Here is the description of a TIA from NINDS: http://www.ninds.nih.gov/disorders/tia/tia.htm
We’ve learnt the hard way with MM disease, NOT to believe everything some doctors say in reference to MM, and we urge people to seek a second opinion from a MM specialist. They have more experience with this disease and they address the need to correct the proper blood flow before risking permanent damage of a stroke, where others sometimes do not and many have suffered devastating consequences because of it.
IMO, I’d get the angio, that will give you all the answers you need and help you know in what direction to go. Whether your MRI/MRA showed a stroke or not, isn't as important at this point, as doing all you can to prevent a devastating stroke in the future. That's my

My prayers are with you.
Mar