Electrocardiography
What is it for?
An electrocardiogram, or an ECG or EKG, is a test that records the electrical activity of your heart, or your
heart rhythm, to assess for different heart conditions. It is a non-invasive test that is used to determine:
- Abnormal heart rhythm (arrhythmias),
- If blocked or narrowed arteries in your heart (coronary artery disease) are causing chest
pain or a heart attack, - Whether you have had a previous heart attack,
- How well certain heart disease treatments, such as a pacemaker, are working.
How do I prepare?
No special preparation is required. Eat, drink, and take medications as normal.
What can I expect during the procedure?
Up to 12 electrodes or sensors are placed on your chest and limbs to record your heart’s electrical signals, which cause your heart to beat. The electrodes are sticky patches with wires that connect to a monitor. If there is hair where the patches are placed, the technician may shave the area. The signals are shown as waves on an attached computer monitor or printer. You can breathe normally but will need to lie still during the test, which takes only a few minutes.
What can I expect after the procedure?
There are no side effects and patients can go back to their usual diet and activities. Test results are available immediately. Your doctor may discuss your results with you the same day as your electrocardiogram or at your next appointment.
