BIOTRONIK ProMRI Estella SR Manual Tecnico página 13

• What happens when the magnet is applied?
The IEGM of the last 10 seconds is stored.
• What has to happen after magnet application?
The patient has to contact the physician for a follow-up.
Replacement Indications
Pacemaker operational status indications
The time span from the beginning of service (BOS) to elective replacement indication
(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:
BOS Beginning of Service
ERI Elective Replacement Indication The replacement time has been
EOS End of Service
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:
• On the programmer after interrogation of the pacemaker
• By a defined decrease in the basic rate as well as the magnet rate
Battery is in good condition; normal
follow-up.
reached. The pacemaker must be
replaced.
End of service time with regular
pacemaker activity.
Change of the mode with ERI
From double-chamber modes, the pacemaker switches to single-chamber pacing. This
replacement 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 capture control
• Rate fading
• Atrial overdrive pacing
• IEGM recordings
• Statistics
• Home Monitoring
• Rate hysteresis
• Ventricular pacing suppression
Rate decrease
The decrease of basic rate and magnet rate is defined as follows:
• In the following modes, the pacing rate decreases by 11%:
DDD(R); DDT(R); DOO(R); VDD(R); VDI(R); VVI(R); VVT(R); AAI(R); AAT(R); AOO(R)
• In the modes DDI(R) and DVI(R), only the VA interval is extended by 11%. This
reduces the pacing rate by 4.5 to 11% depending on the configured AV delay.
Magnet response with ERI
After reaching ERI pacing is performed as follows after applying the magnet or
programming head:
Magnet mode
Cycles 1 to 10:
Automatically Asynchronous with 80 bpm Synchronous with basic
Asynchronous Asynchronous with 80 bpm Asynchronous with 80 bpm
Synchronous Synchronous with basic
rate reduced by 4.5 to 11%
12
After 10th cycle:
rate reduced by 4.5 to 11%
Synchronous with basic
rate reduced by 4.5 to 11%