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Variability of Atrial Sensing During Exercise in a Patient with a Dual Chamber ICD Caused Inappropriate ICD Discharges
Author(s) -
GLOTZER TAYA V.,
RADOSLOVICH GLAUCO A.,
NEGLIA JOHN,
ZIMMERMAN JOHN M.
Publication year - 1999
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 - 10.1111/j.1540-8159.1999.tb00424.x
Subject(s) - medicine , cardiology , intracardiac injection , ventricular tachycardia , implantable cardioverter defibrillator , sinus tachycardia , atrial tachycardia , tachycardia , single chamber , atrial fibrillation , catheter ablation
We present the case of a patient with a dual chamber implantable cardioverter defibrillator (ICD) who experienced inappropriate ICD discharges during exercise. Interrogation of the ICD revealed intermittent atrial undersensing during exercise that was responsible for the erroneous classification by the ICD of sinus tachycardia as ventricular tachycardia. Monitoring of the intracardiac electrograms and Marker Channels during an exercise test confirmed a marked decrease in P wave amplitude during exercise. By increasing the atrial sensitivity setting the problem was resolved.