An electrocardiogram – also called an ECG or EKG – records the electrical signals in your heart. It’s a common test used to detect heart problems and monitor the heart’s status in many situations.
An ECG is a non-invasive, painless test with quick results. During an ECG test, sensors (electrodes) that can detect the electrical activity of your heart are attached to your chest and sometimes your limbs. These sensors are usually left on for just a few minutes.
A holter monitor is a wearable device that records the electrical signals in your heart, like an ECG, usually for 24 hours. Wires from electrodes on your chest go to a battery-operated recording device carried in your pocket or worn on a belt or shoulder strap. While you're wearing the monitor, you'll be able to go about your normal activities, as long as you keep the electrodes and device dry. In addition, your doctor will likely ask you to keep a diary of what you're doing when symptoms occur and the time. Your doctor will compare the diary with the electrical recordings to try to figure out the cause of your symptoms.
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