Electrocardiogram

An electrocardiogram, also called an ECG or EKG, records the heart’s electrical activity, showing how fast it’s beating, whether your heartbeat is steady or irregular, and the strength and timing of electrical signals as they pass through each part of your heart.

How the test is performed

While you are lying down, the technologist will attach several small electrodes to your arms, legs, and chest. It may be necessary to shave or clip some hair so the electrodes will stick to the skin. The patches are connected by wires to a machine that turns the heart’s electrical signals into wavy lines, which will later be reviewed by your doctor.

How to prepare for the test

Make sure the technologist knows about all the medications you are taking, as some impact the test results.

How the test will feel

An ECG is painless. You usually need to remain still during the test and you may be asked to hold your breath for a few seconds as the test is being done. Any movement, including shivering, can alter the results, so it is important to be relaxed and relatively warm during an ECG recording.

Find a Clinic or Service

Thank You
Thank You

“This letter is written to express my utmost appreciation and heartfelt thanks to the Emergency Team at KDH. Last Tuesday morning I received a phone call from my teenage son Markus’s school informing me that he had inadvertently eaten a cookie containing peanuts. As he has a life-threatening peanut allergy, this was an immediate cause for concern. Markus was taken to the ER and immediately given a dose of norepinephrine, followed by an infusion after he had a second reaction. Markus was transferred to CHEO by ambulance later in the afternoon. As you can imagine, this was an incredibly impactful experience for Markus and my entire family. We have such respect for the wonderful work of the Emergency Team at KDH, to whom Markus owes his life. Everyone was caring, kind and professional. Special thanks go to Dr. Pelletier, Dr. Jones, and nurses Catherine, Heather, and Melissa."

Margret