Holter monitor testing is an “ambulatory” electrocardiogram (EKG) that measures and records your heart's electrical activity for 24-48 hours as you go about your daily routine. The monitor is a lightweight, battery-operated device that is worn on a strap over the shoulder or around the waist. The monitor is connected by wires to electrode pads that are taped to the patients’ chest and records electrical activity in the heart.

You do not need any special preparation for a Holter monitor testing.