A Holter monitor (also called an Ambulatory electrocardiography device), named after its inventor, Dr. Norman J. Holter. A Holter monitor or ambulatory electrocardiography (EKG) device is a small, mobile healthcare device that monitors heart rhythms while a person is engaged in normal activities (USUALLY 24 HOURS OR MORE). The ambulatory electrocardiography (EKG) consists of 3 to 7 electrodes that are attached to the surface of the person’s skin. The electrodes are wired to a small Holter monitor that can fit in a shirt pocket. Some Holter monitors can be worn around a person’s waist or neck. Usually, a Holter monitor is powered by batteries.
