thanks for the info guys. Glad yours was successfully ablated Tom. My EP Dr did tell me he thought it was in a really good place to ablate, so hopefully it will all go well and get sorted.
Is is where mine was located. It was around the location of the valve, and was successfully ablated with 17 burns.
To get to the location, the electrophysiologist will most likely have to pierce the septal wall of the atria. In my case the septum overlapped but didn't completely seal shut, so he threaded it through much like the crack in sliding doors. I needed no healing time as I would have for the puncture.
Left = left hand side of heart
Anterior = front
Lateral = sideways running
http://en.wikipedia.org/wiki/Electrical_conduction_system_of_the_heart