A Holter and Event monitor are effective ways to record the electrical activities of your heart while carrying on with normal activities. It is like having a mini electrocardiogram (ECG) machine with you. The Holter records your hearbeat for at least 24 hours. The event monitor records any irregular “events” or heartbeats. To record the irregularity you simply press a button and write down the activities you were performing during the irregularity. You may be asked to wear the event monitor for a couple of days or weeks. The information extracted from this device is then analyzed by your physician.