We have a Burdick Atria 3100 (Cardiac Science). We were told when we bought it 3 or 4 years ago it would have the ability to interface in the future.
We have the same EKG machine. It is able to be networked, and an EKG saved in the machine can be transferred to a computer over the network as a PDF file. However, there is no interface with AC. So to put the EKG into AC, you need to move into Imported Items in the usual way.
I was also hoping that I could record the EKG only electronically without using any expensive EKG paper, but that's not possible with this machine.