Subcutaneous ICD lead position affects defibrillation threshold

Figures

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  Figure 1. A: Radiograph in straight posterior-anterior (PA) view showing position of subcutaneous implantable cardioverter-defibrillator lead after repositioning with successful defibrillator testing at 65 J. B: Computed tomography image demonstrating improved shock vector. Initial lead position (red arrow) and final lead position (green arrow). C: Initial lead position, which failed to defibrillate at 80 J, in straight PA view.