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 ?
It was essential that the devices were programmed appropriately to avoid far-field R-wave oversensing and atrial undersensing to ensure a high sensitivity and specificity for AF detection.
Arrhythmias on surface ECG can be induced by undersensing, oversensing or failure to capture (Fig.