ECGSIM
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Tools

This functionality can be found under the menu item: Options

Views

Four standard views are provided. The user may store the current one by pressing the store button.

AV delay

Marks the delay between the timing at an atrial node representing the AV node (grey dot in the figure above) and the start of the activation in the ventricles. When activating the atria from another focus than the sinus node in the arrival time at the AV node may change and, hence, the PQ interval changes too; the AV delay remains as specified.

Statistics

The upper box of the dialog above displays some basic statistics of the timing parameters. The middle box permits the user to specify these statistics. This is effected by scaling and/or shifting the involved source parameters, while retaining the pattern of their distribution.

The result of these changes are immediately visible in the various panes. Note that while this dialog window is being displayed, all controls outside the dialog window are inactive.

The timing values are supervised automatically to ensure that no non-valid values of the timing parameters are generated (such as: depolarization before 0 ms, or an activation recovery interval less than 50 ms). Note that scaling of the depolarization dispersion will lead to changes in the action potential duration dispersion and vice versa (recall: for each node the repolarization time is equal to the depolarization time plus the action potential duration: rep = dep + apd).

The lower box of the dialog above permits a global adjustment of the shape parameters of the TMPs.

Transition zone

When an area is selected in the heart panel the adaptations are tapered off from 100% at the selected node toward zero at the boundary of the selected area around it. The transition can be modified by changing the slope (see figure below).

Note: Changes only apply to the the currently selected area.