By ICD, i mean defib device. That shouldn’t be a problem as in EECP or ECP your heart beats normally. But all EECP centers are run by cardiologists who will know and you should make the nurse who runs the machine aware of it as well.
If there are any problem, there is a stop button on the control panel that releases pressure immediately and the machine is designed to stop on any abnormal heart beat. The nurses are always very attentive, especially for the first few teatments, after that they get a little slack, however that stop button is positioned so the patient can hit it as well.