A Holter monitor is a small, wearable device that records a continuous ECG, usually for 24 to 72 hours.
Wires from electrodes on the chest go to a battery-operated recording device carried in pocket or worn on a belt or shoulder strap. While you're wearing the monitor, you'll be able to go about your normal activities, as long as you keep the electrodes and device dry. In addition, your doctor will likely ask you to keep a diary of what you're doing when symptoms occur and the time. Your doctor will compare the diary with the electrical recordings to try to figure out the cause of your symptoms.
You will be given a scheduled appointment for this test and the test explained to you, you may be asked to bathe before the appointment. A technician will put the electrodes on your chest and teach you the further details of the machine.You will be given a diary to write your activities and symptoms
There are no significant risks involved in wearing a Holter monitor other than possible discomfort or skin irritation where the electrodes were placed. The Holter monitor can't get wet, or it will be damaged.