An Overview of the ST80i Stress Test System
2-20 ST80i Stress Test System Instructions for Use
About the Zoom ST
The Zoom ST lead display shows one expanded average ECG complex, which is an averaged
ECG enlarged to four times the normal size.
The absolute ST segment values and slope values are displayed for the expanded lead. This
function allows you to better visualize the ST segment changes during the test.
The default ST lead is shown in the zoomed QRS window during the exercise stress test.
When you begin a test, the default ST lead that is shown in the zoomed display is
preconfigured in the user profile. You can select any lead as the zoomed lead from the
Lead drop-down arrow.
You can also select a lead for the default setting. For default settings, see the ST80i
Installation and Configuration Guide.
NOTE Whichever lead is selected as the Zoom ST lead, the ST change trend for this lead is also displayed in
the Trend display. See “About Trend View” on page 2-22.
On the Zoom ST display, the following are displayed:
ST Level (mm or mV)
ST Slope (mV/s or mm/s)
J-Point – default is 60 mm
Default Lead – drop-down
Reference – drop-down
NOTES ST80i can display the lead with the maximum absolute value of the ST level if you select “Max ST
Level” using the drop-down arrow by the default lead.
When using the Compare icon, the averaged ECG is superimposed on the blue reference ECG so that
you can compare current and reference data.
The viewing options for zoomed lead are:
Table 2-6 Zoom Lead Options
Zoom Lead Option Description
Any individual lead - Any of the
twelve leads.
This selection remains in force until you change it.
Dynamic The system monitors all twelve leads and displays the
one with the most significant ST change. The lead that
appears will change automatically during the stress
test; the changes are reflected on printed reports, as
well.
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