NOT SCARY AT ALL...
I went to the local university about two years ago...
they did some tests, the most painful thing was the IV-if you have migraines you have been through worse!!! guaranteed.
I can't remember it all now, but I filled out some paperwork, questionnaires, and of course releases (in case they killed me- JUST KIDDING!) I went down and had an IV placed into my arm?, they did an ultrasound of my heart while they injected bubbles into the IV and made me breath certain ways to see if the bubbles came out of the suspected hole in my heart. I was actually DISAPPOINTED that I didn't have PFO because that meant to me that there might have been a possible chance for a "fix" (I realize now that there was a lapse in reality when I thought that-but anything is possible???) I really was in a bad place at the time and nothing was working so this OPPORTUNITY meant that something, just anything might work and just me a chance for some relief...and when they told me I didn't have a hole in my heart- most people would have been relieved...I was disappointed...a hole in my heart would have meant relief for the unrelenting pain in my head!
Now, I wait for the next possible chance for a miracle?