Spacelabs Healthcare 98000, Operation Manual

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Pathfinder SL v1.9 Operations Manual
18-2
18.2 Retrospective QT analysis
1. With the QT screen displayed, click the Retrospective Analysis button. The Retrospective
Analysis screen displays.
2. The Advanced Options parameters may be set up for a particular study and once saved,
you do not have to reset them for each subsequent analysis.
3. Make adjustments to the settings shown on screen if necessary.
a. Click to enable the desired active channel for QT analysis. Select the best channel
based on the most prominent Q wave and distinct T wave.
b. You may offset the Q-wave, R-wave, TP, or T-end cursors. The offset can be positive
(move cursor to the right of the original position) or negative (move cursor to the left
of the original position). The value of the offset is in n milliseconds. The system pro -
vides default values, which can be changed as needed
c. For R wave trigger, select the plus (+) or minus (-) button. This directs the system to
analyze positive or negative R-waves, respectively. The R wave trigger should be reflec -
tive of the ECG.
d. For T-wave polarity, select the plus (+) or minus (-) button. This directs the system to
analyze positive or negative T-waves, respectively. The T wave polarity should be reflec -
tive of the ECG.
e. You can display the next (or previous) QRS on screen using the arrow buttons.
f. You may change the display scale using the arrow buttons at the top right hand corner
of the ECG screen.
g. Beat information is displayed by clicking on the double arrow.
Click Apply to apply these settings to the system.