The below finding may have implications on how electricity also kills cancer cells. The video on this site by Bill Doyle reports that electricity does affect the death some very aggressive cancer cells, such as glial blastioma brain cancers, and does not affect healthy, normal cells.
“In 1965, Rosenberg made a chance observation that electrolysis experiments were having a remarkable effect on E. Coli bacteria. The bacteria were seen to grow 300 times their normal length and then burst rather than undergo normal cell division. The platinum electrode was shown to produce very small amounts of solube platinum compounds in solution and this material had the remarkable effect on the cell division. Following up this work in the early 1970, cisplatin was found to stop the growth of rapid cell division in certain type of cancer cells and so after in 1978 cisplatin became one of the first major chemotherapy drugs.”