Magnets in portable electronic devices (PEDs) may interfere with cardiovascular implantable devices (CIEDs), according to a research letter published in Circulation: Arrhythmia and Electrophysiology. Noting that a clinically identifiable magnetic interference has been reported in vivo between the iPhone 12 Pro Mac and CIEDs, Corentin Féry, and colleagues focused on PEDs (Apple AirPods Pro and their wireless charging case, the Microsoft Surface Pen, and the Apple Pencil second generation), which exhibit strong magnetic fields and might often be carried in a pocket close to CIEDs. Three-dimensional mapping was performed with up to 2-mm resolution. Ex vivo measurements on the minimal safety distance were performed on five implantable cardioverter defibrillators from two manufacturers. The farthest point where a 10 G intensity has been measured is located about 20 mm and 29 mm from the surface for all displayed Apple products and for the Microsoft Surface Pen, respectively. At a distance between 8 and 18 mm, magnet reversion mode was triggered for the tested PEDs.

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