You can use the toolbar on the left of the screen to change the speed and the gain. Press the little
triangle above the wave, or press "Previews", "Next" button to set the current wave. The vector
loop of the current wave is shown on the right of the screen.
Measurement button. If you want to measure the period and amplitude of a wave, firstly, press
the measurement button, secondly, press the left button of the mouse at the beginning of the
wave you want to measure, and move it to the end point of that wave, then release the button.
The result will be shown on the screen.
When the button is pressed again, the function will be finished.
The print function can help you to print the TVCG wave.
The "Select" function is mainly to reanalyse and superpose a part or all of the QRS waves
according to your selection. The waves and data via superposition can be read in the VCG
module. If you do not select, system will superpose all QRS waves in default. Specific operations:
click "Select" button on the toolbar, when the button is in active state, namely arrowhead turns
purple to yellow, you can click the left button of the mouse on the arrowhead at the top of the
QRS wave to choose it and click "Select" again to change the arrowhead from yellow into purple
or exit the TVCG module, system will analyze and superpose again according to your selection
(As Figure 101). Then you can read it in VCG module.
You can also use the menu, which pops up by right-click on the arrowhead above waves at the
selection state, to perform the quick choice.
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