Spacelabs Healthcare 98000, Руководство по эксплуатации

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Pathfinder SL v1.9 Operations Manual
15-8
15.11 RR Intervals Screen
The RR Intervals screen shows R-R intervals over a 24-hour period. This screen allows you to
compare the heart rate and ECG with the R-R intervals, as well as perform frequency analysis.
To use the RR Intervals screen:
1. In the pane view on the left, click RR Intervals.
2. If you wish to see the ECG, click the ECG icon.
3. If you wish to see the heart rate, click the HR icon.
4. If you wish to see the power spectrum, click the Power Spectrum icon.
5. Click in the HR chart to see the corresponding ECG, heart rate (and power spectrum, if
enabled) for that R-R interval.
6. Click in the HR chart again to move quickly to another time (or click the left / right blue
arrows in the ECG to move backward or forward at 30-second intervals)
.
7. To reset the chart to its original state, click the Reset button.
15.12 Frequency 3D Screen
The Frequency 3D screen shows the results of an automatic multi-epoch frequency analysis in a
3-D graph for up to 48 hours (2 days) of data. The automatic multiple epoch frequency analysis
performs default FFT analyses of the first five minutes of every complete hour in the recording
(to a maximum of 30). The FFT analysis settings used for the Frequency 3D analysis may not be
modified by the user.
The 3-D graph consists of the following data:
• The vertical axis plots the relative Power Spectral Density (PSD) at each point in an analysis
epoch.
• The horizontal axis represents frequency distribution for a specific analysis epoch.
• The Z-axis plots a time line of Spectral analysis repetition from a selected start time to the
end of a selected Total Analysis length.
The system defaults to a 3-D line graph with a maximum PSD of 25.