User's Manual

ST Analysis
10-9
Viewing ST Trends
Trends showing deviations in ST segment level are displayed for each lead
monitored in the past 24-hours. Touching the trend graph or one of the arrow keys
in the menu produces a cursor on the baseline of the trend plot. Position this
cursor at a point of interest in the trend to determine the ST segment level for all
displayed leads at that time. A measurement for each lead is displayed in the
table to the right of the trend display.
Figure 10-6: ST trend display shows an example of a trend display. The graph
plots deviations in ST segment level over time.
Figure 10-6: ST trend display
Selecting the ST Trend Timebase
You can select the time period over which the ST data is displayed in a trended
format. Resolution for each timebase is shown below.
Available timebases are 1.5-, 3-, 6-, 12-, or 24-hours. The factory default setting
for the ST trend timebase is 6-hours.
Resolution Timebase
30-seconds 1.5-hours
1-minute 3-hours
2-minutes 6-hours
4-minutes 12-hours
8-minutes 24-hours
To view ST trends:
1 Touch ECG.
2 Touch REVIEW.
3 Touch ST REVIEW.
4 Touch ST TREND.
5 Touch the trend plot near the
desired data point. Then use
arrow keys to adjust the cursor
position.
AVR
V4
AVL
V5
AVF
V6
I
V1
II
V2
III
V3
00:00
06:00 00:00
06:00
SCALE -2 mm to 2 mm
I 0.16 AVR 0.16
II 0.00 AVL 0.24
III 1.44 AVR 0.16
V1 -1.44 V4 0.16
V2 2.88 V5 0.16
V3 4.32 V6 0.16
ST VALUES at 03:38
To select a timebase:
1 Touch ECG.
2 Touch REVIEW.
3 Touch ST REVIEW.
4 Touch ST TREND.
5 Select TIMEBASE of 1.5-, 3-,
6-, 12-, or 24-hours.