A Holter monitor is a small, wearable device that records your heart’s rhythm. You are usually required to wear a Holter monitor for one to three days. During that time, the device will record all heartbeats. A Holter monitor test is usually performed after a traditional test to check your heart rhythm (electrocardiogram) doesn’t provide enough information about your heart's condition.
A Holter monitor has electrodes that are attached to the chest with adhesive and then are connected to a recording device. Doctors use the information captured on the Holter monitor's recording device to determine if indeed a heart rhythm problem exists.
While wearing a Holter monitor may be a little inconvenient, it's an important test that helps doctors diagnose a patient’s condition.