case_images: PMC7675879_01
case_images: 12-Lead ECG at admission showing biventricular pacing.
case_images: 10.1177_2050313X20974217-fig1.jpg
case_images: PMC7675879_01_10.1177_2050313X20974217-fig1.jpg
case_images: fig1-2050313X20974217
case_images: A 12-lead electrocardiogram (ECG) revealed a sequential biventricular pacemaker rhythm (Figure 1).
case_images: (a) Ventricular tachycardia interrupted by anti-tachycardia pacing. (b)
  Ventricular tachycardia interrupted by shock delivery. (c-f) Sequence of
  multiple episodes of ventricular tachycardia treated with shock
  delivery.
case_images: 10.1177_2050313X20974217-fig2.jpg
case_images: PMC7675879_01_10.1177_2050313X20974217-fig2.jpg
case_images: fig2-2050313X20974217
case_images: Interrogation of the device revealed, during the last 6 hours, the presence of numerous episodes of sustained and non-sustained ventricular tachycardia (VT), which in three occasions reverted with ATP and on eight occasions with shock delivery of 41 Joules (Figure 2).
case_images: QTc interval during administration of HCQ (a) and at baseline 2 months prior
  (b).
case_images: 10.1177_2050313X20974217-fig3.jpg
case_images: PMC7675879_01_10.1177_2050313X20974217-fig3.jpg
case_images: fig3-2050313X20974217
case_images: Upon arrival at the emergency department, while checking the biventricular ICD, an ECG was also done in the absence of pacing, with the observation of spontaneous electrical activity, highlighting a QTc of 483 ms; at electrocardiogram (ECG) performed 2 months earlier, the QTc was 446 ms (Figure 3).