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 | After Cycle 10 |
| magnet application | |
Automatic | Asynchronous, basic | Synchronized with |
| rate at 80 ppm | basic rate reduced |
| | by 4.5 - 11% |
Asynchronous | Asynchronous, basic | Asynchronous with |
| rate at 80 ppm | basic rate at 80 |
Synchronous | Synchronized with | Synchronized with |
| basic rate reduced | basic rate reduced |
| by 4.5 - 11% | 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
