Will Apple watch 5 interfere with an ICD (Implantable Cardioverter Defibrillator)?

Ask your doctor.

Apple Responds

Apple Watch, some of the bands, the Apple Watch Magnetic Charging Cable, and the Apple Watch Magnetic Charging Dock contain magnets. These electromagnetic fields and magnets may interfere with medical devices, such as pacemakers and defibrillators. Consult your physician and medical device manufacturer for information specific to your medical device and whether you need to maintain a safe distance of separation between your medical device and Apple Watch, its bands, the Apple Watch Magnetic Charging Cable, and the Apple Watch Magnetic Charging Dock.