TU,
I just have to chime in with a huge "thanks" for clarifying what AVRT is; ....and isn't.
Even though I've been clean and sober since last April, this thread (and everyone contributing) has been so, soooo helpful the last few months.
Everyday, the whole concept has started to gel. These things seem to take a little time (for me) to internalize more fully.
Thanks again !!!