I'm not sure, but I think using a stun gun on someone with a pacemaker is the only fatal exception to it being non-fatal, right?
It's obvious many of the people posting in these threads haven't even done a web search and read the advertising (much less gone to dejanews and read what people who aren't selling them have to say). You'll find convincing evidence in the ads that "stun guns" cannot injure anyone, whether they're equipped with pacemakers or not.
Ann Emerg Med 1991 May;20(5):583-7
Published erratum appears in Ann Emerg Med 1991 Sep;20(9):1031
Electronic weaponry--a question of safety.
Department of Emergency Medicine, University of Louisville School of Medicine, Kentucky 40292.
Electronic weapons represent a new class of weapon available to law enforcement and the lay public. Although these weapons have been available for several years, there is inadequate research to document their safety or efficacy. Two of the most common, the TASER and the stun gun, are reviewed. The electronic weapon was initially and still is approved by the US Consumer Product Safety Commission; its approval was based on theoretical calculations of the physical effects of damped sinusoidal pulses, not on the basis of animal or human studies. These devices are widely available and heavily promoted, despite limited research into their safety or efficiency and despite recent animal studies documenting their potential for lethality.