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Schematic setup of a usual unipolar irrigated radiofrequency ablation system (A) and a bipolar irrigated radiofrequency ablation system (B). In comparison to a unipolar ablation system, no ground pad is used, and a second ablation catheter is attached to the indifferent electrode port (IND) of the radiofrequency generator. ACT, Active electrode; IND, indifferent electrode; RF, radiofrequency generator; IP, irrigation pump; IP2, second irrigation pump; GP, ground pad.
