I use the CardioCard, by Nasiff Associates. Excellent support and service.
www.nasiff.com. They are avail from several different vendors. I had previously tried a name brand device (can't recall which one, but they had a direct interface with AC). I could not get it to work with my Vista64 machine. Turns out the solution, which Roger Nasiff helped me with, probably would have worked for the name brand device also, but only Roger figured out the problem. The price for the Cardiocard was also less than the name brand device. Basically I run the EKG, save to PDF, and import to AC. Hope that helps. Steve Herch, Ashland, OR