An event monitor, or recorder, is a wearable device that records the electrical activity of your heart periodically for up to a month. While a Holter monitor gathers data about the heart’s activity continuously, an event monitor records data only when an “event” is occurring—that is, when you’re experiencing symptoms.
Your heart has an electrical system that functions like a natural pacemaker. Electrical signals travel through the chambers of the heart to cause it to beat. If the heart’s natural electrical system isn’t functioning correctly, an abnormal heartbeat (arrhythmia) may result. This dysfunction may be the cause of symptoms of your heart racing, palpitations, or feeling faint. An event monitor is a good diagnostic tool for people who may experience infrequent cardiac symptoms.