sick sinus syndrome

Medical Dictionary

sick sinus syndrome n.
Chaotic atrial activity characterized by an abnormally slow heartbeat punctuated by recurring ectopic beats and periods of abnormally rapid heartbeat.

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