Yes. Anti-theft detectors in stores and libraries generate electromagnetic fields that can sense embedded tags on merchandise. It may be possible, under unique circumstances, for these fields to temporarily affect the operation of your heart device. Significant effects from interference are unlikely if you pass normally through the detectors. It is recommended that you: Be aware of anti-theft detectors Walk through at a normal walking speed Dont linger close to the detection system equipment. If you are near an anti-theft system and feel symptoms, promptly move away from the equipment. Your heart device will resume its previous state of operation when you move away from the equipment.