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Quincke's pulse

n.
  1. Capillary pulsation, as shown by alternate reddening and blanching of the nailbed with each heartbeat; it is a sign of arteriolar dilation and aortic insufficiency.Quincke's sign
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.