A fistula creation system comprising both a tissue fastening tool 100 for applying pressure to a periphery around an area of a first biological tissue Wc and a second biological tissue Wd of a body, and a fistula creating device 140. The fistula creating device includes one or more electrodes 144, 146 located at the distal end of a catheter (142, Fig 7) and are in electrical communication with a power source. The electrodes cut the first and second biological tissue within the area when charged by the power source. The fistula creating device may include a balloon (166, Fig 9) with an electrode (168, Fig 9) for expanding the size of the fistula. A method of creating a fistula between two biological tissues is also taught.
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