Can Smartphones with Magnetic Wireless Charging Interfere with Cardiac Implantable Electronic Devices?
BACKGROUND AND PURPOSE:
Many new smartphones are equipped with magnetic wireless charging
E.g., Apple’s MagSafe technology can generate magnet field strength >50 gauss (G)
Nadeem et al. (Journal of the American Heart Association, 2021) assessed whether magnet interference can impact the function of cardiac implantable electronic devices (CIEDs)
≥18 years and presenting to the electrophysiology laboratory for generator change or being seen by the inpatient electrophysiology consult team
Medtronic, Abbott, or Boston Scientific CIEDs
In vivo component
iPhone 12 Pro Max directly placed on the skin over the device
Effect was studied by device interrogation
Ex vivo component
CIEDs from major device companies were tested for magnetic interference caused by iPhone 12 Pro Max
3 participants were tested in the in vivo component
Magnet interference triggered: All (100%) of the patients
11 devices tested ex vivo
Magnet interference triggered: 72.7% of devices
Magnet reversion mode could be triggered at a distance up to 1.5 cm from the anterior aspect of the device
Placing an iPhone 12 Pro Max directly on the skin over an implantable cardiac device can trigger magnet reversion mode and potentially alter function of the device
Devices from three major companies were found to be susceptible to magnetic interference from a smartphone equipped with the latest generation of magnetic wireless charging
The authors conclude
Based on the variability of interactions with respect to different smartphone models, patients are advised to consult with a heart rhythm specialist regarding recommendations specific to their smartphone and CIED
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