User Manual Part 3

PATIENT DIAGNOSTICS
ARRHYTHMIA LOGBOOK
7-15
An example of how HRV data is recorded is shown (Figure 7-4 on page 7-15).
In this example, the HRV data in the first collection period is in valid because
the Brady parameters were programmed after the device was taken out of
Storage. HRV data is successfully calculated and reported at the end of the
second 24-hour collection period. Subsequent HRV data is not reported until
the end of Collection Period 5.
Invalid ValidValid Invalid Invalid
24-hour
Collection
Period 1
Collection Period 1:
Invalid HRV due to Brady
parameters modification
(programming)
Collection Period 2:
Valid HRV; greater than 67%
of collection criteria met; HRV
footprint created
Collection Period 3:
Invalid HRV due to Brady
parameter modifications
(programming)
Collection Period 4:
Invalid HRV; less than 67%
of daily intervals were valid
Collection Period 5:
Valid HRV; greater than 67%
of collection criteria met
24-hour
Collection
Period 2
24-hour
Collection
Period 3
24-hour
Collection
Period 4
24-hour
Collection
Period 5
24 hour
collection
period begins
Figure 7-4. Example of HRV data collection
Counters
The following counters are recorded by the pulse generator and displayed on
the Patient Diagnostics screen:
• Ventricular Tachy
• Brady/CRT
Ventricular Tachy Counters
Information about Ventricular Tachy Counters is available by selecting the
Ventricular Tachy Counters button. This screen displays both Ventricular Tachy
Episode and Therapy counters. For each counter, the number of events since
last reset and device totals are displayed. Ventricular Tachy Episode counters
contains the following data:
• Total episodes
• Treated––VF, VT, VT-1, and Commanded
- DRAFT -