The only thing which would likely affect the reading is a removal of the leads which are stuck to her chest. Wiggling of wires alone would be unlikely to have much effect unless it loosened these leads. The Holter monitor comes with a diary in which the patient fills in any symptoms he/she experiences during the monitoring period. The mother could enter the time of any wiggling of wires which the child may make, so that any artifacts on the tracing could be properly interpreted. Hope this helps. Alicia. [log in to unmask]