Key result
Undersensing during sustained ventricular fibrillation occurred in 11.1% of episodes and significantly prolonged median initial detection time from 2.3 to 5.45 seconds (P<0.0001).
Why the study?
Does undersensing in a noncommitted nonthoracotomy ICD system prolong ventricular fibrillation detection time?
Population
29 patients with a noncommitted nonthoracotomy implantable cardioverter defibrillator.
Design
Cohort
Follow-up
up to 6 months (predischarge, 2 and 6 months)
Authors
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May delay ICD therapy in VF; leaves open whether sensing adjustments improve detection without increasing inappropriate shocks.
Observational (n=29)
Does undersensing in a noncommitted nonthoracotomy ICD system prolong ventricular fibrillation detection time?
Absolute Event Rate: 5.45% vs 2.3%
p-value: p=< 0.0001
Undersensing in noncommitted nonthoracotomy ICDs occurs in about 11% of sustained VF inductions and significantly prolongs detection and redetection times.
Peralta et al. (1997) conducted an observational in Ventricular fibrillation in patients with a noncommitted nonthoracotomy ICD (n=29). Undersensing during ventricular fibrillation vs. Normal sensing (no undersensing) was evaluated on Median initial detection time (seconds) (p=< 0.0001). Undersensing during sustained ventricular fibrillation occurred in 11.1% of episodes and significantly prolonged median initial detection time from 2.3 to 5.45 seconds (P<0.0001).
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