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Figure 1 Decision tree. The square node on the left represents a choice among the three strategies under examination. The circles represent chance nodes at each of the associated downstream probabilities for points of uncertainty. The costs listed are the non-cumulative costs associated with that particular point in the decision analytic model. AV-ICD = atrioventricular (dual-chamber) implantable cardioverter-defibrillator; EP = electrophysiologic.
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