Here's some of those links:
http://www.cccgroup.info/neurosyn.asp (alot about fainting/lightheadedness etc)
http://www.ndrf.org/NDRF%20Patient%20Handbook/Contents.PDF
http://www.medhelp.org/health_pages/Neurological-Disorders/Autonomic-Dysfunction--Dysautonomia-Index-Page/show/857?cid=196
I've had PAT, also known as PSVT, all my life. I've been fortunate that I've never passed out. My rate never went over 200 bpm. It gets up to 198 but not over 200. :-) An echo is a wonderful thing to have done to make sure her heart is normal. A stress test is OK but it may set off her PAT. No surprise there. Not dangerous, just annoying. If her heart is normal, then it's just an electrical blip that can be controlled or improved so it doesn't interfere with her life so much. The cardio will check it out. Passing out is the dangerous part so yes, her rate should be controlled some how. Let me know what you find out.
Just a quick note to say hi! And the intense thumping of the heart is my classic nightime routine. Can knock a glass of water off no prob! Its absolutely annoying...and puzzling to think that something could be wrong. But with asking that question to every cardiologist ive seen...they say its nothing more than your common pvc's that are a pain in the ***! Oh well the next glass that i knock over will be a toast for that annoying earthquake heartbeat!