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146 Stratos LV/LV-T Technical Manual
The pacing rate decreases by 11% when programmed to
DDD(R), DDT(R), D00(R), VDD(R), VDI(R), VDT(R), VVI(R),
VVT(R), AAI(R), AAT(R), or A00(R).
In DDI(R), DDI/T(R), DVI(R), and DVT(R) modes, only the V-A
delay is extended by 11%. This reduces the pacing rate by
4.5-11%, depending on the programmed AV delay.
The Stratos CRT-Ps indicate the need for replacement by a
defined decrease of its rate after magnet application and the
programmer displays it upon interrogation of the programmed
parameters. The magnet rate in all modes decreases as shown
in Table 30
.
Table 30: Stratos CRT-Ps behavior after reaching ERI
Magnet Mode Cycles 1-10 after
magnet application
After Cycle 10
Automatic Asynchronous, basic
rate at 80 ppm
Synchronized with
basic rate reduced
by 4.5 - 11%
Asynchronous Asynchronous, basic
rate at 80 ppm
Asynchronous with
basic rate at 80
Synchronous Synchronized with
basic rate reduced
by 4.5 - 11%
Synchronized with
basic rate reduced
by 4.5 - 11%
If the CRT-P is programmed to dual chamber pacing, it will
switch to single chamber pacing when it reaches the elective
replacement indication. The “ERI mode” varies according to the
programmed pacing mode and is indicated by the pulse
generator. Upon reaching the replacement indication, the
following functions are automatically deactivated:
• Post-AES pacing
• Preventive overdrive pacing
• Rate adaptation
• Rate fading
• Statistics
• Snap-shots (Holter)
• Automatic lead check