PMID: 7513857Mar 1, 1994Paper

Apparent extension of the atrioventricular interval due to sensor-based algorithm against supraventricular tachyarrhythmias

Pacing and Clinical Electrophysiology : PACE
S K LeungY H Chow

Abstract

Rapid ventricular tracking response to supraventricular tachyarrhythmia is one major limitation to DDD pacing. In a DDDR pacemaker, sensor-based algorithms have been used to control these arrhythmias. These include the use of an interim rate limit (conditional ventricular tracking limit) or a separate maximum tracking and sensor rate limits (discrepant upper rate). These algorithms limit inappropriate ventricular pacing rate during tracking of pathological supraventricular tachyarrhythmia and atrial flutter by Wenckebach-like prolongation of the AV interval. We observed that this may cause an unexpected extension of the AV interval in patients with high atrial rate and intact AV nodal conduction. This was due to P wave rate above the conditional ventricular tracking limit or maximum tracking limit, but AV paced interval prolongation was avoided by the occurrence of intrinsic conduction, albeit at an AV interval longer than the programmed AV interval. This might appear as failure of ventricular pacing on the ECG. This phenomenon is a modified form of "upper rate" behavior occurring in the AV interval, and should be recognized as a normal behavior rather than pacemaker malfunction.

References

Mar 1, 1992·Pacing and Clinical Electrophysiology : PACE·C P LauS Song
Dec 1, 1990·Pacing and Clinical Electrophysiology : PACE·J GrossS Furman
Dec 1, 1990·Pacing and Clinical Electrophysiology : PACE·M T LeeJ Vandegriff
Jul 15, 1990·The American Journal of Cardiology·J S LandzbergJ C Griffin
Nov 1, 1986·Pacing and Clinical Electrophysiology : PACE·C DaubertJ Gouffault
Aug 1, 1989·Mayo Clinic Proceedings·S T HiganoG Eisinger

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Citations

Jul 1, 1995·British Heart Journal·B IbrahimR Palmer
Jun 27, 2009·The American Journal of Emergency Medicine·Linda A ReganLewis S Nelson
Feb 1, 1995·Pacing and Clinical Electrophysiology : PACE·S S Barold
Feb 28, 2001·Europace : European Pacing, Arrhythmias, and Cardiac Electrophysiology : Journal of the Working Groups on Cardiac Pacing, Arrhythmias, and Cardiac Cellular Electrophysiology of the European Society of Cardiology·H J MarshallM D Gammage
Jul 25, 2003·Pacing and Clinical Electrophysiology : PACE·S Serge BaroldIgnacio Gallardo
Nov 1, 1994·Pacing and Clinical Electrophysiology : PACE·P A LevineB Mann

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