Switch for second-degree atrioventricular block

N° 3
Manufacturer Microport CRM Device PM Field SafeR mode
  • 62-year-old woman
  • Reply DR pacemaker (Microport CRM-Sorin) for sinus dysfunction and paroxysmal AV block
  • SafeR algorithm
  • Episodes of switch to DDD for second degree AV block (AVB2)
Graph and trace
  • Atrial pacing with spontaneous ventricular activation
  • Second degree AV block
  • After 3 non consecutive dropped atrial pacing, switch to DDD (vertical line)
  • Atrial and ventricular pacing
  • This tracing shows an example of switch for second degree AV block (AVB2)
  • The device switches to DDD if it senses 3 non consecutive dropped sensed or paced atrial events in the last 12 ventricular cycles
  • This parameter is non programmable (no possibility to modify the values 3 or 12)