Insertable loop recorders and pacemakers do not currently emit audible tones, but many implantable cardioverter defibrillators (ICDs) and cardiac resynchronization therapy defibrillators (CRT-Ds) do. The beeping tone lets you know that something needs attention from your doctor.

For example, the device can make a beeping tone when the therapy your device is delivering changes unexpectedly, or when the battery is low. If your heart device detects one of these conditions, it will make a beeping tone for up to 30 seconds at least once a day. The alert continues until your doctor or nurse checks your heart device. Some ICDs will emit a tone if you are too close to a magnet, in which case you do not need to contact your doctor. Simply move the magnet away from your device. The beeping tone is designed to get your attention, not to alarm you.

If you hear beeping tones from your heart device, call your doctor for instructions or refer to the device manual for specific information on audible tones.