A Holter monitor is a small, wearable device that records your heart rhythm. You usually wear a Holter monitor for one day/24 H/ . During that time, the device will record all of your heartbeats. A Holter monitor test is usually performed after a traditional test to check your heart rhythm (electrocardiogram) isn’t able to give your doctor enough information about your heart’s condition.
A Holter monitor has electrodes that are attached to your chest with adhesive and then are connected to a recording device. Your doctor uses information captured on the Holter monitor’s recording device to figure out if you have a heart rhythm problem.
While wearing a Holter monitor may be a little inconvenient, it’s an important test that may help your doctor diagnose your condition.