BIOTRONIK Evia HF - Heart Failure Monitoring Statistics

Chapter 6 Statistics
Evia HF / HF-T Technical Manual
PAGE 83
6.6.5 Vp Suppression
This section provides information related to the number and amount of Vp suppression that has
occurred. Data in this section includes the number of Vp suppression switches and the number of Vs
searches for Vp suppression. The graph shows the percentage of Vp suppression for each day.
Figure 54: Vp Suppression
The Vp Suppression information, shown in Figure 54, provides the number of Vs searches for Vp
Suppression, the number of success switches and the duration per day the algorithm is active.
6.7 Heart Failure Monitoring Statistics
6.7.1 Mean Heart Rate
The mean heart rate is calculated based on both ventricular sensed and paced events. All types of
events, including VES (PVC) shall be included in the calculation of the mean value. On a daily basis,
the device measures and stores the patient’s mean heart rate over a 24 hour period and has a value
range of 0 to 180 bpm. The daily value is stored for a period of 240 days. After 240 days, new daily
values shall replace the oldest daily values. The programmer presents the daily bpm-value in a trend
graph for the last 240 days.
6.7.2 Mean Heart Rate at Rest
On a daily basis, the Evia CRT-P measures and stores the patient’s resting heart rate (MHRR). Average
values are calculated over a dened period. The daily value is based on the smallest mean value in any
evaluation window over the resting period. The mean heart rate is calculated based on both ventricular
sensed and paced events. All types of events, including VES (PVC) shall be included in the calculation
of the mean value.
The MHRR value is measured during a programmed period, dened by a Rest Period Start Time and
a Rest Period Duration. The resting period shall be adjustable via the programmer. The MHRR has a
value range of 0 to 180 bpm. The daily value (MHRR) is stored for a period of 240 days. After 240 days,
new daily values replace the oldest daily values. The programmer presents the daily bpm-value in a
trend graph for the last 240 days.