Example of home monitoring trend concerning recurrence of asymptomatic persistent atrial fibrillation. Data are from a 72-year-old woman implanted for Brady–Tachy Syndrome. Circles, number of mode switches; diamonds, mode switch durations as percentage of 24 h. ( A ) After 6 months atrial fibrillation burden suddenly raised from 0 to 100% (persistent atrial fibrillation). The patient was completely asymptomatic. An unscheduled follow-up was considered necessary. ( B ) After an electrical cardioversion was performed and sinus rhythm restored, further atrial fibrillation recurrences were no longer detected.