Undersensing of P waves in the presence of an adequate P wave due to automatic postventricular atrial refractory period extension.

Pacing and Clinical Electrophysiology : PACE
J H Wilson, S Lattner

Abstract

Two cases in which a DDD pacemaker failed to track P waves due to repetitive activation of the automatic postventricular atrial refractory period (PVARP) extension are reported. In one case, the cycle was initiated by a premature ventricular contraction (PVC); in the other, by touching the unipolar pacemaker with a needle while suturing. We demonstrated that chest wall stimulation can be used to induce cycles of repetitive automatic PVARP extension and failure to track P waves. We demonstrated in vitro that touching a unipolar pacemaker with a needle can generate a signal sufficient to mimic a QRS complex, and initiate a cycle of repetitive P wave undersensing.

References

Nov 1, 1985·Pacing and Clinical Electrophysiology : PACE·L F SatlerA A Del Negro
Jul 1, 1987·Pacing and Clinical Electrophysiology : PACE·A J Greenspon, K J Volosin

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Citations

Mar 6, 2007·Journal of Interventional Cardiac Electrophysiology : an International Journal of Arrhythmias and Pacing·S Serge BaroldBengt Herweg
Apr 6, 2000·Pacing and Clinical Electrophysiology : PACE·E Y FuK A Ellenbogen
Dec 10, 1999·Pacing and Clinical Electrophysiology : PACE·F BodeJ Potratz
Feb 1, 1994·Pacing and Clinical Electrophysiology : PACE·M G PieterseH J Wellens
Nov 1, 1992·Pacing and Clinical Electrophysiology : PACE·B M van GelderM I el Gamal
May 1, 1996·Pacing and Clinical Electrophysiology : PACE·S S Barold
Jul 7, 1999·Pacing and Clinical Electrophysiology : PACE·U K WiegandJ Potratz
May 11, 1999·Pacing and Clinical Electrophysiology : PACE·P JaïsJ Clémenty
Dec 10, 1999·Pacing and Clinical Electrophysiology : PACE·S S Barold
May 11, 1999·Pacing and Clinical Electrophysiology : PACE·S ParaskevaidisG Louridas

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