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Pseudo Crosstalk Behavior in a Patient with Atrio‐ventricular Block and Implanted Biventricular Defibrillator
Author(s) -
HO REGINALD T.,
MARK GEORGE E.,
RHIM EUGENE S.,
SHORROCK SUSAN M.
Publication year - 2007
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.1540-8159.2007.00906.x
Subject(s) - medicine , cardiology , ventricular fibrillation , implantable cardioverter defibrillator , ejection fraction , dilated cardiomyopathy , cardiomyopathy , heart failure , heart block , confusion , electrocardiography , psychology , psychoanalysis
We present a 59‐year‐old man with a dilated cardiomyopathy (ejection fraction = 20%), congestive heart failure and atrio‐ventricular (AV) block who underwent implantation of a biventricular defibrillator (BiV ICD). While undergoing cardiac transplant evaluation for drug‐refractory ventricular fibrillation, his telemetry recorded findings resembling crosstalk inhibition. Device interrogation was normal. All episodes occurred at 1:00 a.m. suggesting a routine device operation. Left ventricular capture management, a new feature that automatically measures left ventricular pacing thresholds at 1:00 a.m., had been programmed to Monitor. Understanding this sophisticated pacing algorithm might avoid confusion when operative in patients with AV block.