undersensing
un·der·sens·ing
(ŭn'dĕr-sens'ing),Nonsensing of the intracardiac atrial or ventricular depolarization signal by a pacemaker.
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undersensing
Cardiology Failure of a pacemaker to sense the P or R waves, which may cause the pacemaker to emit inappropriately timed impulses. See Pacemaker.McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.