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. 2017 Aug 24;3(10):470–474. doi: 10.1016/j.hrcr.2017.07.005

Figure 1.

Figure 1

Details of implantable cardioverter-defibrillator (ICD) interrogation at the time of presentation. A: The log of therapies delivered by the ICD reveals that from 16.06 to 17.07 hours the patient has 10 shocks delivered for ventricular fibrillation (VF). B: Intracardiac electrogram of 1 of the above episodes from the device shows a ventricular ectopic beat falling on the T wave, initiating a polymorphic ventricular tachycardia (VT) degenerating into VF correctly identified by the device. The patient received an appropriate therapy with a 35-joule shock terminating the VF (not in the picture).