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112  Stratos LV/LV-T Technical Manual   
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The VV value can deviate from the number of VES’ since the 
Stratos CRT-Ps can also classify ventricular sensed events 
that were preceded by an atrial event such as extrasystoles 
via the AVES discrimination function after As. 
 
In Stratos CRT-Ps: 
•  RVs followed by LVp. 
•  RVp followed by LVp 
•  LVp followed by RVp 
 
A total counter that records grand total of all conductions is 
located below the conduction counters. 
2.20.3 Rate Trend 
The rate trend is displayed as a line chart and consists of the 
heart rate trend and the pacing rate trend.  The atrial event, the 
ventricular events and the events in the remaining third channel 
are recorded at a set time.  In the rate trend, the heart rate in 
pulses per minute (ppm) is recorded in the upper rate chart, and 
the percentage of pacing is shown in the lower chart.  In the 
Stratos CRT-Ps, the trends of the three different channels are 
identified by three different colors. 
Please note that a gap in the trend will be displayed for the 
duration of an asynchronous magnet program or temporary 
program. 
2.20.4 Atrial and Ventricular Rate Histogram 
The Stratos CRT-Ps are provided with separate atrial and 
ventricular histograms.  A bar chart displays the heart rate as a 
percentage and corresponding absolute value.  The number of 
times in which the heart rate occurs in specific ranges is 
recorded separately according to sensing and pacing.  The rate 
range between 40 and 390 ppm is divided into 10 ppm 
increments along a rate measuring axis.  The distribution of 
distribution of the heart rates can be displayed on the 
programmer as a diagram during follow-up examinations.