ICD alert sounds vary by manufacturer and device model. Your device clinic will explain what the specific alerts on your device mean, as these are set individually based on your programmed thresholds. In general, a beeping tone draws your attention to something the clinic needs to know about, such as a change in battery level, a sensed arrhythmia, or the delivery of a therapy.
The alert will typically repeat at intervals until your clinic reviews the device and adjusts the alert settings. If you hear a beeping tone from your ICD, contact your device clinic as soon as possible. If you have also felt unwell or received a shock, go to A&E.
Our ICD sounds and alerts page explains the common alert types in more detail.