Prevention of inappropriate therapy in implantable cardioverter-defibrillators
Results of a prospective, randomized study of tachyarrhythmia detection algorithms
Dominic A.M.J. Theuns, MSc*,
A. Peter J. Klootwijk, MD, PhD*,
Dick M. Goedhart, MSc and
Luc J.L.M. Jordaens, MD, PhD*,*
* Department of Cardiology, Thoraxcenter, Erasmus MC, Rotterdam, the Netherlands
Department of Statistics, Cardialysis, Rotterdam, the Netherlands

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Figure 1 Tree diagram showing the results for 653 stored spontaneous tachyarrhythmia episodes. DC group = dual-chamber supraventricular detection algorithm group; EGM = electrogram; pts = patients; SC group = single-chamber supraventricular detection algorithm group; SVT = supraventricular tachyarrhythmias; VT = ventricular tachycardia.
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Figure 2 Number of spontaneous episodes per patient for the two study groups. The error bars extend down to the minimum value and up to the maximum value. The box extends from the 25th percentile to the 75th percentile, with a black box at the median (50th percentile). Abbreviations as in Figure 1.
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