Mintek Pacemaker LV-T ユーザーズマニュアル

118  Stratos LV/LV-T Technical Manual   

This is the sensitivity of the ventricles displayed over time.  The 
R-wave trend is displayed in the form of a line chart.  The R-
wave trend is a rolling, long-term trend with a fixed resolution of 
36 hours.  Therefore, the 240 time windows with 36 hour 
recording periods result in actual recordings of approximately 
one year.  The R-wave trend can record amplitudes from 0.0 to 
20 mV.  In the Stratos LV, the specific RV and LV amplitudes are 
shown in trends of different colors.  The R-wave trend is 
available in all modes that sense in the ventricle, except 
triggered modes DDI(R)/T, DVT(R), VDT(R) and VVT(R). 

The atrial and ventricular impedances are measured in the 
Stratos CRT-Ps and both values are displayed in the impedance 
trend in the form of a line chart.  The impedance trend is a 
long-term trend with a fixed resolution of 36 hours per window.  
Therefore, the 240 possible windows, each with 36 hour 
recording periods, result in an actual recording time of 
approximately one year.  This recording only occurs in paced 
events. 

After approximately one year of recording, the impedance trend 
begins to roll.  The impedance can also be recorded in the left 
atrial and left ventricular channel.  The values of the impedance 
trend lie between 0 to 10k Ω.  The atrial and both ventricular 
channels are shown as different colored trends.