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Figure 4 Ventricular tachycardia during simulated stress and neuromuscular incapacitating device (NID) discharge. This shows an NID discharge in the thoracic configuration that resulted nonsustained ventricular tachycardia that spontaneously reverted back to sinus rhythm. In the enlargement, the time of onset of tachycardia shows the possibility that the penultimate NMI discharge was delivered at the vulnerable period of the T-wave, resulting in the arrhythmia. Abbreviations as in Figure 1.