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Electrocardiogram (EKG, ECG)
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Description | Treatment Options | John Muir Health Capabilities
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Definition
An electrocardiogram (EKG or ECG) is a test that produces a graphic picture of the electrical activity of the heartbeat. With each beat, an electrical impulse travels through the heart. The electrical impulse causes the muscle to squeeze (contract) and pump blood from the heart to the body.
Description
Several sticky tabs called sensor electrodes are applied to the chest in a special pattern. These sensors pick up the electrical activity in the heart. The sensors are connected to wires called leads, which are then connected to the EKG machine. The electrical activity of the heart is recorded on moving paper in the EKG machine. The recording produces a graph-like picture that the doctor reviews and analyzes. During the EKG recording, you must lie quietly for 10-20 seconds, because the electrocardiogram will detect any muscle or body movement.
Treatment Options
The EKG provides two kinds of information. The EKG measures time intervals as the heartbeat travels. The doctor can determine how long the electrical wave takes to pass through the heart. This information is important as it helps determine if the electrical activity is normal or slow, fast or irregular. Additional information about the heart muscle can be obtained using the EKG. A new or old heart attack can be identified. The EKG is a valuable tool and is usually the first test performed in a heart examination. Some individuals will need frequent EKG tests to monitor the status of the heart's electrical and conduction system.
John Muir Health Capabilities
The ability to perform an EKG exists in multiple areas at both John Muir Medical Center, Walnut Creek Campus and John Muir Medical Center, Concord Campus. Experienced clinical staff perform EKGs anytime night or day.
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