Mintek Pacemaker LV-T ユーザーズマニュアル
Stratos LV/LV-T Technical Manual 91
Confirmation
When the suspicion criterion has been met, the Stratos CRT-Ps
slightly modify the AV delay interval (+ or - 50 ms) for one
cardiac cycle. If the Vp-As interval remains stable, a PMT is
confirmed. Otherwise, a PMT is not confirmed and the algorithm
restarts. Once the PMT algorithm has confirmed a PMT, the
cycle is terminated.
slightly modify the AV delay interval (+ or - 50 ms) for one
cardiac cycle. If the Vp-As interval remains stable, a PMT is
confirmed. Otherwise, a PMT is not confirmed and the algorithm
restarts. Once the PMT algorithm has confirmed a PMT, the
cycle is terminated.
The upper interval limit range must be shorter than the limit of
the VA delay (350 ms, for example). The test method is based
on the length of the pacing interval or the AV delay (refer to
the VA delay (350 ms, for example). The test method is based
on the length of the pacing interval or the AV delay (refer to
Table 22
).
Table 22. PMT Test Method
Interval Length
AV Delay
Test Method
> UTI (upper
tracking interval)
tracking interval)
≤ 200 ms
Increasing the AV
delay by 50 ms
delay by 50 ms
> UTI + 50 ms
> 200 ms
Reducing the AV
delay by 50 ms
delay by 50 ms
≤ UTI
≤ 200 ms
Increasing the UTI
by 50 ms
by 50 ms
≤ UTI
> 200 ms
Increasing the UTI
by 50 ms
by 50 ms
> UTI and ≤ UTI +
50 ms
50 ms
> 200 ms
Length of UTI = TA
+ 50 ms
+ 50 ms
Termination
Stratos CRT-Ps extend TARP (Total Atrial Refractory Period) for
one cycle to equal the V-V interval + 50 ms.
one cycle to equal the V-V interval + 50 ms.
2.10 Adjustment of the PMT Protection
Window
The PMT protection window can be automatically adjusted. This
automatic adjustment functions in the following manner:
automatic adjustment functions in the following manner: