Inappropriate ventricular fibrillation detection by extravascular implantable cardioverter-defibrillator

The Aurora™ extravascular implantable cardioverter-defibrillator system (EV-ICD, Medtronic, Inc.) is an alternative for indicated patients in whom vascular access is either infeasible or undesirable. It is comprised of a pulse generator, placed subcutaneously along the left lateral chest wall in the mid-axillary region, connected to a single lead which is tunneled subcutaneously from the pulse generator to the subxiphoid space, and then substernally. The lead includes two ring electrodes and two coil electrodes (Figure 1).