Figure legends
Fig 1: A: ECG during the presentation in outpatient clinic (VVI @ 80 bpm). The lower rate was increased from 60 to 80 bpm empirically during the last device checkup; B: The device interrogation after the ECG. The lower rate was made 6545 to see whether any episode or symptom is experienced. Lot of artefacts were noted. As the patient became dizzy a diagnosis of oversensing was made.
Fig 2: The stored electrogram showing induction of VT by PVCs.
Fig 3: The reanalyzed and annotated Fig 1B showing that the artefacts were not lead noise. All the ‘VS’ was related to QRS complex of the PMVT. The induction was facilitated by the relative bradycardia (lower rate @ 45 bpm).