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Any of the three standard leads used in electrocardiography, having one electrode attached to the chest and another to a limb.
A unipolar lead in which one electrode is placed on a limb.
A record obtained from such leads.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.