A Holter monitor is a small medical device used for 24 hours to continuously measure heart rate and rhythm.
Patients wear this device for 24 to 48 hours while going about their regular daily routine. The device is small and can be worn under clothes.
Doctors use this test to obtain more information about a patient’s heart function. The Holter monitor helps doctors determine if the heart is receiving sufficient oxygen, or if the electrical impulses in the heart are delayed.