postextrasystolic pause

[pōst′ĕk-strə-sĭ-stŏlĭk]

n.

The somewhat prolonged cycle in the heartbeat immediately following an extrasystole.

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