undersensing

un·der·sens·ing

(ŭn'dĕr-sens'ing),
Nonsensing of the intracardiac atrial or ventricular depolarization signal by a pacemaker.

undersensing

/un·der·sens·ing/ (-sens″ing) missed sensing of cardiac electrical signals by an artificial pacemaker, resulting in too frequent or irregular delivery of stimuli.

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.
References in periodicals archive ?
Arrhythmias on surface ECG can be induced by undersensing, oversensing or failure to capture (Fig.
By separating the sensing electrodes from the one that delivers energy, the lead design also protects against post-shock undersensing, which has been reported with other single-lead transvenous lead systems.