The Holter monitor is a type of electrocardiogram (EKG) that is used to check the EKG tracing continuously for a certain period of time. It is a small device that can be worn and keeps track of your heart rhythm. Small plastic patches (electrodes) are placed at certain locations on the wall of the chest.
Your doctor may wish that you wear a Holter monitor for one to two days. While you wear the device, it records all of your heartbeats. The electrical activity of the heart can be recorded to assess symptoms of light-headedness, dizziness, palpitations, or fainting. Any abnormal beats or rhythms that may lead to these symptoms are recorded.
A Holter monitor test is generally performed after a traditional test to check your heart rhythm (electrocardiogram) if the electrocardiogram does not give your doctor sufficient information about your heart’s condition.