E-Bombs: Technology Update
vaderhelmet writes "'In these media-fueled times, when war is a television spectacle and wiping out large numbers of civilians is generally frowned upon, the perfect weapon would literally stop an enemy in his tracks, yet harm neither hide nor hair. Such a weapon might shut down telecommunications networks, disrupt power supplies, and fry an adversary's countless computers and electronic gadgets, yet still leave buildings, bridges, and highways intact. It would strike with precision, in an instant, and leave behind no trace of where it came from.' (Story from IEEE Spectrum Online)"
Believe it or not, most modern pacemakers are fairly well shielded against EMP. Most of the problems that were had with people being near microwaves, etc. were with older designs of pacemakers. They have to put the warning signs on microwaves because you never know who has an old pacemaker. However, the amount of old (unipolar lead) pacemakers still around is rather small. Any EMP which damages the new designs is going to make every muscle in your body twitch, and do heart damage to those without pacemakers too.
I'm afraid I don't have a link, but I could refer you to the Report of Task Group 34, from the American Association or Physicists in Medicine, section IV. Don't ask why I have that paper lying around my office - it's a long story. The basic gist is, pacemakers are already encased in a Faraday cage.