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The arm electrodes (A and B) are placed on the mid-arm, on the lateral aspect of the biceps, immediately below the V4 horizontal line. The abdominal electrodes (C and D) placed 7.6 cm (∼3 inches) below the umbilical horizontal line, and 5 cm (∼2 inches) on either side of the umbilical vertical line. The distance between these two electrodes to be 10 cm (∼4 inches).
