If you received an implantable cardiac device such as an ICD or pacemaker, there is a good chance that you may also receive a remote monitoring device.
It worth noting that not all centres give their patients these and not all patients receive them.
The remote monitor is a small device that is plugged in at home and has a communication channel e.g. phone, wi-fi; with your cardiac centre. Periodically your device will contact it and data will be sent via it to the cardiac centre.
This allows the hospital to monitor your heart remotely saving you trips to them and also gives you extra peace of mind.