Holter monitor is a machine that continuously records the heart's rhythms. The monitor is worn for 24 to 48 hours during normal activity. The Halter monitor in a pocket or pouch worn around your neck or waist. The monitor runs on batteries.

It is very important that you accurately record your symptoms and activities so the provider can match them with your Halter monitor findings.

While wearing the device, avoid: 

Electric blankets
High-voltage areas
Magnets
Metal detectors

Continue your normal activities while wearing the monitor. You may be asked to exercise while being monitored if your symptoms have occurred in the past while you were exercising.