Apple has updated some product safety material found in the Support section of its website to clarify the potential of its new MagSafe feature to interfere with pacemakers. It notes that, while the extra magnetism involved should not make the technology more dangerous than the average wireless-charging device or accessory, a user with a medical device should keep it a certain distance away from the relevant devices.
https://www.notebookcheck.net/Apple-updates-its-safety-information-to-warn-users-with-pacemakers-about-the-potential-increased-risks-of-using-MagSafe.517107.0.html