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.