standard lead

Medical Dictionary

standard lead (lēd)
n.

  1. Any of three standard bipolar limb leads of an electrocardiograph, designated I, II and III. Lead I records potential difference between the right and left arms; lead II, the difference between right arm and left leg; lead III, the difference between left arm and left leg.

  2. A record obtained from such a lead.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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