ECG

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Electrocardiography (ECG or EKG[1] from Greek: kardia, meaning heart[2]) is the recording of the electrical activity of the heart. Traditionally this is in the form of 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 surface of the skin and recorded or displayed by a device external to the body.[3] The recording produced by this noninvasive procedure is termed an electrocardiogram (also ECG or EKG).

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