Welch Allyn CardioPerfect Workstation Resting ECG Module - User Manual - Manual (Page 25)

CardioPerfect Workstation
Resting ECG Module - User Manual
DIR 80012333 Ver. E 25 / 54
To select the QTc correction method:
1. In the File menu, click Settings. The Settings dialog box is displayed.
2. Click ECG and click on the Viewing tab.
3. Under QTc method, click the method that you want to use.
4. Click OK to save your changes.
4.5. QT dispersion (optional)
Note: QT dispersion option not sold in the US.
QT dispersion (QTd) is defined as the difference in duration between the longest QT interval and
the shortest QT interval in any lead.
There are several ways of calculating the QT dispersion. These ways depend on:
The reference point in the QRS complex from which the measurement should be started
Whether the marker that indicates the reference point should be local or global. A local
marker is one that is taken for each lead, and therefore differs for each lead. A global
marker is one that is used for all leads, and therefore is the same for all leads.
The number of leads that is used for calculation.
The QTd duration is calculated and displayed in the Parameters area of the view. You can specify
a number of options that affect the calculation of the QTd duration.
To set QTd options:
1. In the File menu, click Settings. The Settings window is displayed.
2. Click ECG and click on the QT dispersion tab.
3. In the QT dispersion tab, select which reference point you want to use, and whether it
should be local or global.
4. Select the number of leads you want to use, see section 8.1 for details.
5. Click OK to save your changes.