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Patient Monitor User Manual
Fridericia:
QTc
Framingham:
QTc
9.10.6 Setting QT Baseline
To quantitatively express the QTc values change, the user can set a QTc baseline, the baseline is
used for calculating ΔQTc value. The user can set the baseline through ECG Setup > QT
Analysis > Save Baseline , and the monitor displays The Baseline is saved at: (Time). If no
baseline has been set, the first five minute QTc value after the QT measurement begins will be
automatically set as the baseline. If a new baseline is set, the previous baseline is discarded.
Because ΔQTc alarm is based on the difference of the baseline with the current values,
inappropriate baseline settings may lead that no ΔQTc alarm is generated.
NOTE:
The QT baseline will be cleared in following situations:
1) Turning off the monitor;
2) Changing the electrode type;
3) Changing the calculation lead in 3 electrodes;
4) Changing the patient type;
5) Admitting new patients;
6) Enters or exits Demo mode.
If QT analysis is needed, please reset the baseline.
9.10.7 QTc Alarm Setup
Select ECG Setup > QT Analysis > Alarm Setup to change the following QT alarm settings:
Separately switch on or off QTc alarm and ΔQTc alarm and set the alarm level.
Set the thresholds of QTc alarm and ΔQTc alarm. When QTc value or ΔQTc value exceeds
the preset thresholds, an alarm will be triggered.
9.10.8 QT View
To enter QT view, please select ECG Setup > QT Analysis > QT View . In the QT View
interface, the color of current QT segment and QT value are consistent with the color of HR. The
color of baseline and QT value are yellow.
In the QT View interface, the user can save QT baseline through clicking Save as Base when QT
values gets stable. If no QT baseline is saved, the monitor automatically saves the baseline when
the first five minutes value appears. Besides, the user can record and print the QT view.
1
⎛
⎞
HR
3
=
×
⎜ ⎜
⎟ ⎟
QT
60
⎝
⎠
=
+
×
−
QT
154
(1
60
)
HR
- 114 -
Monitoring ECG
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