Premium
R Wave Undersensing Caused by an Algorithm Intended to Enhance Sensing Specifity in an Implantable Cardioverter Defibrillator
Author(s) -
EBERHARDT FRANK,
PETERS WERNER,
BODE FRANK,
WIEGAND UWE K.H.
Publication year - 2003
Publication title -
pacing and clinical electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.686
H-Index - 101
eISSN - 1540-8159
pISSN - 0147-8389
DOI - 10.1046/j.1460-9592.2003.t01-1-00269.x
Subject(s) - medicine , implantable cardioverter defibrillator , algorithm , qrs complex , sinus rhythm , signal (programming language) , cardiology , computer science , programming language , atrial fibrillation
This article reports on a case of ventricular undersensing despite normal R wave amplitudes during sinus rhythm in an ICD patient. Undersensing of ventricular signals was noted without any evidence of lead dislocation or variation in signal amplitude. Undersensing was due to an exceptionally small R wave signal width and a feature of the Biotronik sensing algorithm designed to avoid oversensing. This algorithm, intended to enhance the sensing specifity of the device, requires registration of two consecutive points above the maximum programmed sensitivity for a ventricular sense event. After modifying the algorithm to a single point registration undersensing disappeared. (PACE 2003; 26:1776–1777)