Your child is having a test that uses a wearable device called a Holter monitor. The monitor does an electrocardiogram (ECG, also known as an EKG) to record the heart's electrical activity over 24 hours or more. The test helps the cardiologist (a heart healthcare specialist) find out if your child has an arrhythmia (an irregular heartbeat). Your child should not feel any discomfort from the device.

• Read the instructions that came with the monitor to see how to place the leads on your child at home or put them back on if they come off.
• Make sure your child wears the monitor as directed. It can be worn over the shoulder in a pouch, in a cradle necklace around the neck, or carried in a pocket. Sometimes healthcare providers use an e-patch Holter monitor. This wireless monitor attaches to the skin.
• Your child should continue with regular activities unless your cardiologist tells you otherwise.
• To keep the monitor dry, make sure your child avoids swimming, bathing, or showering.
• In the diary you were given, write down any symptoms that your child has, such as chest pain, skipped heartbeat, or dizziness. Add the date, time, and what your child was doing when the symptoms occurred.
• Return as instructed by the cardiologist.

Your child:

• Has discomfort or irritation from the device
• Has a fast heart rate or feels fluttering of the heart

Your child:

• Has severe chest pain
• Faints 

How is a Holter monitor test done? The electrodes will be placed on your child's chest with a sticky material. This can be done at a hospital, in the cardiologist's office, or at home. The electrodes have a wire that comes out of them that are connected to the Holter monitor. The Holter monitor is worn on a belt or carried in a pocket. You'll be given a diary where you'll write down your child's symptoms during the test.

What happens after the monitoring is completed? Your child's cardiologist will review the heart rhythm on the monitor and follow up with you to discuss the results. The cardiologist may recommend more testing or may begin treatment, depending on the results.