July 1, 1998Journal of Cardiovascular Electrophysiology
Detection of Ventricular Fibrillation by Transvenous Defibrillating Leads:
Key result
Dedicated bipolar sensing links to only ~134 msec faster VF detection versus integrated bipolar sensing.
- P=0.026
- n=30
Why the study?
Dedicated bipolar sensing has been suggested to be safer than integrated bipolar sensing due to increased failure to redetect ventricular fibrillation after unsuccessful shocks with integrated bipolar leads.
Does dedicated bipolar sensing improve the detection and redetection of ventricular fibrillation compared to integrated bipolar sensing in patients undergoing transvenous defibrillator implantation?
Comparison
Dedicated bipolar sensing vs integrated bipolar sensing (distal tip to coil, 18.3 mm spacing)
Design
Observational study with simultaneous recordings
Authors
Discussion
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Implication
Dedicated bipolar sensing shortens VF redetection after failed shocks; leaves open whether it should supplant integrated bipolar leads in ICDs.
Study Design
Type
Observational (n=30)
Structured PICO
Does dedicated bipolar sensing improve the detection and redetection of ventricular fibrillation compared to integrated bipolar sensing in patients undergoing transvenous defibrillator implantation?
P
Population
30 patients undergoing transvenous defibrillator implantation with a Transvene lead.
E
Exposure
Dedicated bipolar sensing
C
Comparator
Integrated bipolar sensing (distal tip to coil, interelectrode distance 18.3 mm)
O
Outcome
Detection time and number of undetected beats for the initial episode of ventricular fibrillation and redetection following a failed first shocksurrogate
Main Result
Absolute Event Rate: 2804% vs 2938%
p-value: p=0.026
There are only minor differences in ventricular fibrillation detection and redetection between dedicated and integrated bipolar sensing configurations, which are primarily explained by differences in signal energy.
Cite This Study
Goldberger et al. (1998) conducted an observational in Patients undergoing transvenous defibrillator implantation (n=30). Dedicated bipolar sensing vs. Integrated bipolar sensing was evaluated on Mean detection time for the initial episode of ventricular fibrillation (msec) (p=0.026). Dedicated bipolar sensing demonstrated only minor differences in mean detection time for initial ventricular fibrillation compared to integrated bipolar sensing (2804 vs 2938 msec).