What to do if i am worried about my 2 year old son having a holter monitor test. i don't know what to expect.?

Simple procedure: They attach pads to the kids chest wall in different places.These are attached to a pager like recorder that can be worn on the waistline or diaper.It takes a continuous EKG for a defined period, often 12 or 24 hrs. The data collected is run through a computer that picks up the rhythms and can print out any suspicious areas for the doc to review.