Holter monitor test

Holter monitor test

holter monitor

Location and Contact

Markham site:

Phone: (patient scheduling office): 905-472-7020
When you arrive at Markham site: Register at registration desk in main lobby. The registration desk clerk will direct you to your procedure.

Uxbridge site:

Phone: 905-852-9771 ext. 5249
When you arrive at Uxbridge site: Register at central registration desk on main floor. The registration desk clerk will direct you from there.

A Holter monitor is a small battery operated unit with attached ECG wires and electrodes that records your heart rate and rhythm continuously for 24, 48 or 72 hours, as ordered by your physician. This is done to evaluate if there are any abnormalities in the pattern of your heart rhythm or rate that may be leading to symptoms such as palpitations, chest discomfort, dizziness or fainting.

To have a Holter monitor test, your doctor needs to fill out a referral form. Download Holter monitor test referral form.

Learn more about making an appointment and coming to the Markham or Uxbridge site.

The Holter monitor will be applied by a cardiology technologist.

Before and during your Holter monitor test

Please wear comfortable clothing such as a front-buttoning blouse or shirt that gives easy access to your chest on the day of your test. Avoid wearing a dress, full slip, corset or pantyhose.

You cannot shower or bathe while the monitor is attached to you so please do this before arriving. 

The technologist will apply small sticky electrodes to your skin which will be attached by wires to a portable electronic monitor that you can carry under your clothing. The electrodes and monitor will record your heart activity over the following 24 to 72 hours, depending on what your doctor has ordered.

Please do not sleep under an electric blanket, as the monitor may pick up electrical interference. Otherwise, plan to continue with your regular daily activities.

After your Holter monitor test

Your technologist will tell you how and where to return the Holter monitor. We will download the information about your heart from the monitor, review it and send a report to the cardiologist for interpretation. The results will be sent to your physician.

Frequently asked questions about the Holter monitor test

  • Can I exercise while wearing the monitor?
    Yes, it is preferred that you continue with your normal activity to get the best results. Remember though that you cannot shower or bathe during the 24 to 72 hours you are wearing the monitor. Please let the technologist know if you do plan to exercise for added safety of the electrodes (stickers).
  • Can I take my medications?
    Yes, continue to take your medications as prescribed.
  • What is an ECG?
    An ECG or electrocardiogram is a recording of the electrical activity of your heart.