My father has recently had a pacemaker installed, which has been a great success. However, he has a query. For years he has slept with a small but very powerful horseshoe magnet in his bed to prevent cramp. (This may be classed as an Old Wives' Tale, but it's undoubtedly very effective - for him anyway!) However, he is now nervous about whether this magnet could affect the settings of his pacemaker, so has given up sleeping with it in his bed. But now he's suffering from cramp again. Could a powerful magnet in fact be dangerous for a pacemaker?
He also wonders about his radio controlled watch, and if this could affect his pacemaker.
If you can't answer these questions, I'd be very grateful if you could suggest who could.
Many thanks.