Implantable loop recorder (ILR). The ILR (Reveal®) is placed subcutaneously under local anaesthesia, and has a battery life of 36 months. The device has a solid-state loop memory, and the current version can store up to 42min of continuous single-lead ECG. Retrospective ECG allows activation of the device after consciousness has been restored. Automatic activation is also available in case of occurrence of predefined arrhythmias.