①Q：What is a Holter monitor?

    A：A Holter monitor is a battery-powered portable device that continuously measures and records various electrical activity of the cardiovascular system for above 24 hours. The device has electrodes attach to your skin and record your ECG during your day-to-day activities are called ambulatory electrocardiograms.

    

    ②Q：what can a holter monitor do?

    A：The Holter is commonly used for monitoring heart activity (electrocardiography or ECG). Its extended recording period is useful for observing occasional cardiac arrhythmias which would be difficult to identify in a shorter period. For patients having more transient symptoms, a cardiac event monitor which can be worn for a month or more can be used.

    ③Q：Why do people wear Holter monitors?

    A：Regular electrocardiograms (ECGs or EKGs) let your doctor look at your heart’s activity at one point in time during your ECG test. But abnormal heart rhythms and cardiac symptoms may come and go. That’s why your doctor may want to evaluate your heartbeat over time while you go about your normal activities.  You may be asked to wear a Holter monitor if you have fast, slow or irregular heartbeats called arrhythmias.

    ④Q：how to wear a holter monitor?

    A：The recording device can be worn in a case on a belt or on a strap across the chest. The device may be visible under light clothing, and those wearing a Holter monitor may wish to avoid shirts with a low neckline.

People being monitored should not limit normal daily activities, since its purpose is to record how a heart works under various actual conditions over an extended period. It is an electrical device, however, and should be kept dry; showering or swimming should be avoided. Monitors can be removed for a few minutes without invalidating collected data, but proper reattachment is critical to avoid degradation of its signals. Beyond changing batteries, one should leave its handling to trained personnel.