Holter Monitor

Holter Monitor

Holter Monitor

A Holter monitor is a device that measures your heartbeat. A small, battery-powered machine, it is strapped to your waist, with wires and electrodes that attach to your chest. You will need to wear it for 24 hours.

PATIENT INFORMATION: Before your appointment, please read our patient information page with essential information on our location, parking, payment options and more.

Why do I need a Holter monitor test?

You may need a Holter monitor test if your doctor thinks that there may be a problem with your heart rate or rhythm. For example, you might be experiencing symptoms such as:

  • Palpitations
  • Dizzy spells
  • Collapsing
  • Fainting
  • Irregular heartbeat (arrhythmia)

Sometimes, your medical professional may prescribe a Holter monitor test after you have had an ECG. This is because an ECG  only monitors your heart for a short time, which isn’t always enough to find a potential problem.

Risks and complications

Holter monitoring is safe and complication-free. There is no significant risk, other than some people noticing minor skin irritation from the adhesive dots (electrodes) applied to the skin to monitor the heartbeat.

Do I need to prepare for my Holter monitor?

You’ll need to take a shower as you cannot remove your Holter monitor or get it wet. Do not apply any lotions or moisturisers before your test.

On the day of the Holter
  • Some people with hairs on their chest may have their chest shaved to help the electrode stick to their skin.
  • We will attach some small wires attached to electrodes to your chest. These electrodes connect to your Holter monitor and will measure your heart’s activity. (The Holter monitor is about the size of the small pack of playing cards.)
  • We’ll show you how to attach the device to your clothes.
What happens during my Holter monitoring?
  • Go about your normal daily activities
  • You must keep your device on at all times
  • Never take your device off – even for a moment
  • Record all your daily activities, including the times you performed them. You can also comment on how you felt at those times (e.g. breathless, dizzy, normal).
What happens next?
  • After your 24-hour testing time, you’ll return to our clinic.
  • We will remove your Holter monitor; then the cardiologist will assess the results and discuss them with you.
  • The cardiologist will notify your GP and any other appropriate medical professionals who have your consent.

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