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A Holter monitor, like an electrocardiogram, reads your heart’s electrical activity. 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 is not functioning correctly, an abnormal heartbeat (arrhythmia) may result. This may be the cause of symptoms of your heart racing, palpitations or feeling faint.
The electrodes on the Holter monitor detect the heart’s electrical activity and transmit this information through the leads to the monitor. The battery-operated monitor continuously records this data.
Whenever you experience heart symptoms while wearing the monitor, you will write down the symptom, date and time, and what activity you were doing at that time. Your cardiologist will compare your symptom log against the data gathered by the monitor to see how your heart was responding when you performed certain activities.
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