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Electrical Proarrhythmia: Induction of Inappropriate Atrial Therapies due to Far‐Field R Wave Oversensing in a New Dual Chamber Defibrillator
Author(s) -
WOLPERT CHRISTIAN,
JUNG WERNER,
SCHOLL CHRISTOPH,
SPEHL SUSANNE,
CYRAN JOACHIM,
LÜDERITZ BERNDT
Publication year - 1998
Publication title -
journal of cardiovascular electrophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.193
H-Index - 138
eISSN - 1540-8167
pISSN - 1045-3873
DOI - 10.1111/j.1540-8167.1998.tb00126.x
Subject(s) - medicine , proarrhythmia , cardiology , atrial fibrillation , atrial tachycardia , tachycardia , p wave , qrs complex , reentry , catheter ablation
R Wave Far‐Field Sensing in Dual Chamber Defibrillators . This case report describes delivery of atrial therapies during a sinus tachycardia in a new dual chamber implantable cardioverter defibrillator inappropriately caused by far‐field oversensing of ventricular beats in the atrial channel. Upon classification of the PR interval pattern, the rate criterion for an atrial tachycardia was fulfilled, and the device initiated high‐frequency burst pacing as the first stage of programmed tiered atrial therapies. Atrial fibrillation subsequently was induced by high‐frequency burst pacing, and eventually a programmed 10‐J shock was delivered for successful termination of atrial fibrillation. The phenomenon of far‐field oversensing of ventricular beats could be repeatedly observed during exercise testing and abolished by decreasing the atrial sensitivity.