Ho Reginald T, Mark George E, Rhim Eugene S, Shorrock Susan M
Department of Medicine, Thomas Jefferson University Hospital, Philadelphia, PA, USA.
Pacing Clin Electrophysiol. 2007 Dec;30(12):1555-7. doi: 10.1111/j.1540-8159.2007.00906.x.
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.
