User's Manual

ST/AR ST Segment Algorithm
ST/AR Arrhythmia Monitoring
7-9
• 5-wire: up to two leads if monitoring a chest and a limb lead
• 5-wire: up to six leads if monitoring two limb leads
• 5-wire: up to 12 leads if monitoring using EASI
• 6-wire: up to 8 leads if monitoring two limb leads and two chest leads
Note—No ST analysis is done on a patient if an electrode falls off.
Displayed
ST Data
ST data displays as values in the Patient Sector and Patient Window. A positive
value indicates ST segment elevation; a negative value indicates ST segment
depression. You can view ST data in ST Review, Trend Review, and Event
Review windows.
EASI ST
Analysis
The Information Center generated ST values presented in the patient sector and
Patient Window for EASI derived leads is STindx (ST Index). STindx is a
summation of three ST segment measurements, using the leads that can indicate
ST segment changes in the different locations of the heart:
• anterior lead V2
• lateral lead V5
• inferior lead aVF
ST Operation
Turning ST
Monitoring On/
Off
The ST Setup Window allows you to turn ST monitoring on or off for all
available ECG leads.
To turn ST monitoring on at the Information Center, perform the following
steps:
You would turn ST monitoring off if:
Step
Action
1 From the Patient Window, click the All Controls button.
2 From the All Controls Window, click the
ST Setup button.
3 From the ST Setup Window, click
ST On.