Philips IntelliVue TRx Instructions For Use Manual page 148

How the QT Analysis Algorithm Works
Adjustment
Select the QT Lead
7-20 ST/AR Arrhythmia Monitoring
Draft - 1 Aug 08
Description
The QT Lead field allows you to select which
leads to analyze when calculating the QT
parameters. To select the desired lead by
clicking on the QT Lead drop down arrow then
highlighting the lead from the list that displays.
Choose:
• All if you want a global QT measurement
based on all available leads. For standard
placement leads I, II, III, V and V1 through
V6 are used. For EASI placement directly
acquired AI, AS, and ES leads are used.
Note—
stored.
• Primary if you want to use the primary
lead for the QT measurement. If the primary
lead becomes unavailable or is changed the
QT measurement continues with the new
primary lead.
• A single lead from the list to use that lead
for QT measurement. If the lead you select
becomes unavailable QT monitoring stops.
Note—
leads are not available for single lead
selection. These leads are processed,
however, when you select Primary in the
QT Lead field.
This may include leads that are not being
The V7, V8, V9, V3R, V4R or V5R