Holter monitor is a small medical device used for 24-hour continuous test to measure heart rate and rhythm. Patients wear this device for 24 to 48 hours while they follow their normal daily lifestyles. Size of this device is just like a small camera.
Doctors use this test when they need more information about the heart’s functioning. This test helps doctors to find out whether the heart is receiving sufficient oxygen, or if the electrical impulses in the heart are delayed.