This is good to know.

As a side note - have you ever tried cardiac catheter ablation? I suppose it depends on your arrhythmia issue, but I had this done a couple of years ago for AV nodal reentrant tachy & it completely took away my symptoms (ie. 300+ HR @ 2x/month). I still worry about small bouts of mild A-fib, but it's nothing like it used to be.