The influence of ventricular fibrillation duration on defibrillation efficacy using biphasic waveforms in humans
Stephan Windecker, MDa,
Raymond E. Ideker, MD, PhD, FACCa,
Vance J. Plumb, MD, FACCa,
G. Neal Kay, MD, FACCa,
Gregory P. Walcott, MDa and
Andrew E. Epstein, MD, FACCa
a Division of Cardiovascular Disease, Department of Medicine, The University of Alabama at Birmingham, Birmingham, Alabama, USA

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Figure 1 Description of the patient groups. VF = ventricular fibrillation.
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Figure 2 Change in the defibrillation threshold energy at ventricular fibrillation (VF) durations of 5 and 10 s.
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Figure 3 Change in the defibrillation threshold energy at ventricular fibrillation (VF) durations of 10 and 20 s.
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Figure 4 Change in the defibrillation threshold energy at ventricular fibrillation (VF) durations of 5 and 20 s.
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Figure 5 Grouped data for the defibrillation threshold energy for all patients (20 each tested at 5, 10 and 20 s of ventricular fibrillation [VF], respectively).
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