24-hour holter monitoring
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What is 24-hour holter monitoring?
During a holter test, several adhesive electrodes are placed on your chest. These electrodes are connected by thin wires to a small device (the holter recorder) that you wear under your clothing, usually on a belt or shoulder strap.
The device records your heart rhythm for 24 hours while you go about your normal daily activities.
Why is 24-hour holter monitoring done?
Your doctor may recommend a holter test to:
- detect heart rhythm disorders
- further investigate symptoms such as palpitations, dizziness or loss of consciousness
- check whether your heart rate is too slow or too fast
- monitor the effect of a treatment or medication on your heart rhythm
Some rhythm disorders do not occur during a short elektrocardiogram (ECG) at the hospital. With continuous recording over 24 hours, there is a greater chance of detecting them.
How does the examination work?
The electrodes are attached to your chest during a consultation at the hospital. Before you go home, you will receive instructions about the device and what you may and may not do. You will be given a diary to fill in.
You then go home and continue your normal daily activities. During the 24 hours of the examination, you must not shower, bathe or swim. Try not to pull the electrodes loose. If one does come off, note this in the diary. Wear the device day and night, including while sleeping.
Result
The recorded data are read out and analysed by specialised staff and your cardiologist. The results are reported and, if necessary, further treatment will be started.