A cardiac event monitor is a battery-powered portable device that you control to tape-record your heart’s electrical activity when you have symptoms. They are used to make a record of your electrocardiogram (ECG or EKG) when you have fast or slow heartbeats, or feel dizzy or like you want to faint. It can also be used to see how you respond to medicines.
Electrocardiograms let your doctor look at your heart’s activity at rest and at one point in time. But abnormal heart rhythms and cardiac symptoms may come and go. The main purpose of an event monitor is to record your heart rate and rhythm during a symptom or event, working only when a person turns on the device. Your provider may recommend an event monitor when symptoms are infrequent – less than daily. You may be asked to wear a cardiac event recorder if you have fast, slow or irregular heartbeats called arrhythmias.
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