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The Loop (TV)
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Electrocardiography (ECG or EKG) is a transthoracic (across the thorax or chest) interpretation of the electrical activity of the heart over a period of time, as detected by electrodes attached to the outer surface of the skin and recorded by a device external to the body. Dr. Janet Fraiser used an EKG on Ayiana. (SG1: "Frozen")
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