PMC7675879_01
12-Lead ECG at admission showing biventricular pacing.
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A 12-lead electrocardiogram (ECG) revealed a sequential biventricular pacemaker rhythm (Figure 1).
(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.
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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).
QTc interval during administration of HCQ (a) and at baseline 2 months prior
(b).
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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).