User's Manual

Ultraview Care Network
15-20
Figure 15-10: ECG rhythm strip
Figure 15-11: ECG rhythm strip
Variability Trend Plots
When operating in ECG mode, a trend of fetal heart rate variability is automatically
calculated and plotted. This X-Y graph, printed every 10-minutes, is computed by
combining long-term and short-term heart rate variability. One point is plotted for
each 128 heart beats.
The X-axis corresponds to time, and the Y-axis corresponds to the value of
variability for each measurement. The Y-axis is divided into three levels of
variability:
• above average
•average
• below average
The most recent data is represented at the right side of the graph and it takes
approximately 100-minutes of monitoring for the variability plot to reach its full
capacity.