What is ambulatory ECG monitoring?
Ambulatory ECG monitoring provides your cardiologist with a recording of your heart’s electrical activity over a prolonged period.
There are two types of ambulatory ECG used to establish the nature of suspected heart function problems:
- Holter monitoring – a small device records your heart rate and rhythm continuously, usually during a 24 or 48 hour period
- Event monitoring – similar to holter monitoring but the device is worn for up to seven days and only records when the patient activates it upon feeling symptoms

What should I expect?
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Each monitor takes about 20 minutes to fit at one of our testing centres
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Small electrodes are attached to your chest and connected to the monitoring device for collection of data
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Patients should go about their typical routines and are requested to keep a diary of activities while wearing the monitor to provide clues about potential triggers for any abnormal readings
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In the event that an electrode or lead detaches from your chest, simply reattach it to continue recording. The diagram above illustrates lead placement by colour as a guide.
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You will need to return to the test centre for removal of the monitoring equipment
Preparation
- If you are being fitted with a holter monitor, shower before you arrive as you will not be able to remove it during the monitoring period and cannot get the device wet
- Event monitors can be removed for showering
- Avoid applying lotions, perfumes or powders to the chest area and remove any neck jewellery to assist with adhering the electrodes
- You should also avoid using certain heating devices that may interfere with readings, your clinician can advise you on this at your fitting
What happens next?
At the end of the recording period, return to the test centre to have the equipment removed. Once the results have been reviewed, a full report will be sent to your referring doctor who will be able to advise you on any further course of action required.
Patient information
Click below to download patient information about ambulatory ECG monitoring
DownloadOur doctors
Dr Stephen Pavia
Electrophysiologist
Special clinical interest in arrhythmias / electrophysiology and cardiac device implant remote monitoring
Dr John Cotroneo
Cardiovascular Imaging Specialist
Cardiovascular Imaging Specialist with a special interest in non invasive cardiac imaging
Dr Patrick Disney
Cardiovascular Imaging Specialist
Special clinical interest in non invasive cardiac imaging and Adult Congenital Heart Disease
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