I think you need to decide how useful the electronic interface is - I personally use any ekg available and then just scan it in. Midmark sounds good, but is very expensive. The one Al talks about is good (I have one to play with), but software is a little finicky and the original wire it comes with is flimsy. I currently just use an older Burdick that a retired doctor gave me. Whenever I do an EKG I have a template under addendum where I do a "separately identifiable" report (I am fairly finicky about documentation so I feel like I overdo it for reports in event of audit). We then scan it in.