|AT/AF episodes ≥48 h (defined as 2 consecutive days in which the device records at least 18 h of AT/AF per day)|
|New-onset AT/AF in patients with no history of AT/AF|
|Sensed ventricular rate of ≥100 beats/min during atrial arrhythmia for at least 20% of the time since previous device interrogation|
|Ventricular pacing that has increased by 30% since the last device interrogation|
|Nonsustained ventricular tachycardia ≥5 beats|
|Loss of capture⁎|
|Increase in pacing voltage threshold ≥1 V compared with the previous interrogation⁎|
|Significant changes in atrial or ventricular lead impedance, defined as impedance <200 or >2,000 Ω, unstable lead impedance deemed to be clinically actionable, ≥50% change in lead impedance since last interrogation⁎|
|Elective replacement indicator or end of life present⁎|
AT/AF = atrial tachycardia/atrial fibrillation.
↵⁎ Not used for analysis due to low numbers of events.