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mV in amplitude and 25 mm per second in time axis (Fill last page of report if timespan ends in
the middle of page).
6.2.5.
ECG graph
The application provides also an option to visualize the current ECG measurement and BPM. By
selecting “ECG Graph” from the application menu or click on the heart icon on the main screen.
To return to the main screen, click “Back” on the PDA or select “Overview” from the application
menu. Figure 12 shows an example of a good quality ECG signal. Interactive graph zooming
option enable zoom in or out x-axis ( from 1 to 10 seconds) or y-axis (mV) by fingers.
Note: in case zooming-out area where no grapf exist will appear as no ecg graph exist. Zoom-
in areas and graph should be seen on screen.
Figure 15: Full screen visualization of the ECG measurement.
Examples, but not limited to, of different signal forms that can be encountered during
measurements are shown and described in Figure 13. All forms, except the last one (Figure 16f),
are considered as ECG. Two examples of quality ECG signal are shown in Figure 16a and Figure
16b. An inverted ECG can be measured if the placement of the electrodes is reversed (Figure
16c). While this should not be of any concern, for usual ECG form, reverse the placement of the
electrodes. When moving the arms or while walking, the ECG base line may wander, which
should also not be of any concern (Figure 16d). Example of a noisy ECG signal is on Figure 16e;
heartbeat timings may still be obtained from such a signal. Figure 16f shows an example of noise,
such as might be caused by a disconnected electrode; there is no ECG signal left in it. Therefore,
during the measurement, make sure to check the quality of the ECG signal from time to time. If
the ECG signal is not adequate, fix the electrodes on another recommended position from
Figure 8, and insure that the ECG signal is good. Usually within a few minutes, a good galvanic
contact with the subcutaneous tissue is established and the ECG signal becomes stable.
NOTE: A measurement must be started to use this feature.