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What Is Event Monitoring?

Man's chest showing the heart. Electrodes are positioned on the skin and connected to a Holter monitor on the waistband of his pants.

Event monitoring is a painless way to record your heartbeat. The monitor is a small electrocardiogram (ECG) that you carry with you. It runs on batteries. The event monitor lets you record your heart rate and rhythm when you feel symptoms. Some event monitors can find and record irregular heart rhythms in real time, with or without symptoms. Some event monitoring records your heart rhythm for your healthcare provider to review at a later time. Some wireless monitors allow data to be sent to your provider's office for evaluation right away after an event is recorded. You may carry this monitor for a few days or weeks. You can get your heart monitor in a hospital, test center, or healthcare provider’s office.

When using an event monitor

Stay away from electric blankets, magnets, metal detectors, and high-voltage areas such as power lines. They may affect the recording.

Your event monitor

Your healthcare provider will show you how to use your event monitor. Wear it as instructed all the time. When you feel a symptom, push the button to start recording. (Some monitors start and stop recording automatically when an abnormal rhythm is detected.). Your provider will tell you how to do this. Be sure to keep a diary. Write down symptoms in detail. Include the time and date.

Event monitor diary

  • Write in the time of day for each entry you make.

  • Note each change in activity. This includes when you take medicine.

  • Note any symptoms you feel. Also write down what was going on around you when the symptoms occurred.

Event Monitor Diary

An ECG recording of an irregular heartbeat during an event.
An ECG recording of an irregular heartbeat during an event.

An ECG recording of a regular heartbeat.
An ECG recording of a regular heartbeat.

Online Medical Reviewer: Lu Cunningham RN BSN
Online Medical Reviewer: Quinn Goeringer PA-C
Online Medical Reviewer: Steven Kang MD
Date Last Reviewed: 6/1/2019
© 2000-2019 The StayWell Company, LLC. 800 Township Line Road, Yardley, PA 19067. All rights reserved. This information is not intended as a substitute for professional medical care. Always follow your healthcare professional's instructions.