Your heart device monitors your heart rhythm and delivers therapy wherever you are in the world. There are no specific restrictions on travelling abroad with an ICD, though there are some practical considerations to plan for.
Take your device ID card with you at all times. This identifies your device to medical staff if you need treatment abroad and helps at airport security. Make sure you have comprehensive travel insurance that covers your cardiac condition. Let your ICD clinic know you are travelling, particularly if you are going for an extended period, as remote monitoring may need to be adjusted for a different time zone or if you will be away from your base station.
If you need medical attention abroad, inform the treating team that you have an ICD and carry the manufacturer contact details with you. In an emergency, they can provide technical support to local clinicians.