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electrocardiogram (ecg or ekg)

an electrocardiogram (ecg, ekg) is a test that measures the electrical signals that control heart rhythm. the test measures how electrical impulses move through the heart muscle as it contracts and relaxes.

during an electrocardiogram, small pads (electrodes) are attached to the skin on the chest, arms, and legs. the electrodes are also connected to a machine that translates the electrical activity into line tracings on paper. these tracings are often analyzed by the machine and then carefully reviewed by a doctor for abnormalities.

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this information does not replace the advice of a doctor. healthwise, incorporated, disclaims any warranty or liability for your use of this information. your use of this information means that you agree to the terms of use and privacy policy. to learn more about healthwise, visit healthwise.org. © 1995-2022 healthwise, incorporated. healthwise, healthwise for every health decision, and the healthwise logo are trademarks of healthwise, incorporated.

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