29 After Implantation
Replacement Indications
Pacemaker operational
status indications
The time span from the beginning of service (BOS) to elective replacement indica-
tion (ERI) is determined by, among others, the following:
• Battery capacity
• Lead impedance
• Pacing program
• Pacing to inhibition ratio
• Pacemaker circuit properties
The following are the defined pacemaker operational statuses:
ERI activation ERI detection is automatically activated after the following events:
• Successful auto-initialization
• Storage for longer than 24 months
ERI display ERI is displayed as follows:
• By a defined decrease in the basic rate as well as the magnet rate
• After interrogation of the pacemaker
Change of the pacing mode
with ERI
From dual-chamber modes, the pacemaker switches to single-chamber pacing.
This replacement mode depends on the programmed mode and is displayed on the
programmer.
Deactivated functions
with ERI
The following functions are deactivated:
• Atrial pacing
• Night program
• Rate adaptation
• Atrial and ventricular active capture control
• Rate fading
• Atrial overdrive pacing
• IEGM recordings
• Statistics
• Home Monitoring
• Rate hysteresis
• Ventricular pacing suppression
BOS Beginning of Service Battery is in good condition; normal
follow-up.
ERI Elective Replacement
Indication
The replacement time has been reached.
The pacemaker must be replaced.
EOS End of Service End of service time with regular pace-
maker activity.
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