Roland Piquepaille writes "Killing cells affected by cancer while leaving healthy ones alone is not a new idea (check here or there for example). But, in "Ultra-fast shocks scramble cells," Nature describes a new approach based on electrical nanopulses. These electric shocks last only a few billionths of a second while reaching during this very short amount of time power levels of terawatts. They also are very intriguing, apparently forcing cancer cells to commit suicide. For this reason, "there is plenty to be worked out before the human body is zapped with nanopulses." This overview contains more details and references. It also includes images showing how cells are affected by these electric nanopulses."