Can I go through store anti-theft detectors? 

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.