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Related to unipolar lead: precordial leads
Etymology: L, unus + polus, pole; AS, laedan, to lead
1 an electrocardiographic conductor in which the exploring electrode is placed on the precordium or a limb while the indifferent electrode is in the central terminal.
Usage notes: (informal)a tracing produced by such a lead on an electrocardiograph.
An electrocardiographic lead in which one electrode is placed over the precordium, and the other over a different region of the body, e.g., a leg or the lower abdomen.
See also: lead