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electrocardiograph e·lec·tro·car·di·o·graph (ĭ-lěk'trō-kär'dē-ə-grāf')
Abbr. ECG, EKG
An instrument used in the detection and diagnosis of heart abnormalities that measures electrical potentials on the body surface and generates a record of the electrical currents associated with heart muscle activity. Also called cardiograph.