A guide to Holter monitoring


Your Holter monitor must not get wet, which means you won’t be able to have a shower, bathe or go swimming until it is removed after the 24 or 48-hour monitoring period.

To best prepare for your test, please:

  • Shower before coming to your appointment to have the monitor fitted.
  • Avoid using any moisturising lotions, powders, spray deodorants, and perfumes after your shower (this can reduce the quality of the Holter tracing).
  • Wear loose, two-piece clothing to make it easier for the monitor to be fitted and removed.
  • Bring a list of any medications you are taking.

Underwire bras can be worn, however many people find they are more comfortable during the device fitting wearing a wire-free bra/sports bra. 

The chest area needs to be free of hair to ensure a good quality tracing. Your collector will shave your chest if this is required before fitting the Holter monitor, or you can do this yourself prior to your appointment.