PMC9551256_01
A) The intracardiac electrogram shows an episode of ventricular tachycardia (VT) at a cycle length of 360 milliseconds, following a ventricular ectopic, which persisted despite anti-tachycardia pacing. B) The intracardiac electrogram shows an episode of ventricular tachycardia (VT) at a cycle length of 310 milliseconds, which was terminated following a 35 J shock therapy.
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F1
The ICD interrogation (VT zone > 150 bpm and VF zone > 188 bpm) showed multiple episodes of monomorphic VTs at 170 to 200 beats per minute following a ventricular ectopic (Figure 1A). The tachycardia persisted despite device-delivered anti-tachycardia pacing (Figure 1A), and it was terminated by 38 shocks of 35 J each (Figure 1B).