Welch Allyn CardioPerfect Workstation Resting ECG Module - User Manual - Manual (Page 16)

CardioPerfect Workstation
Resting ECG Module - User Manual
DIR 80012333 Ver. E 16 / 54
2.13. Signal quality indication
If Welch Allyn CardioPerfect Workstation finds the signal from one of the channels to be
erroneous, for example caused by a disconnected electrode, the monitor will display
“Bad signal
on…”. The trace shows square waves, see example below.
Please check the indicated electrodes/channels immediately!
The status information is saved with the test. Erroneous leads will show square waves on both
the Review and the printout. Depending on the duration of the erroneous signal no interpretation
or measurement will be possible and therefore will not be shown.
In the few moments between a lead being disconnected and that event being detected by the
software, pacemaker spikes may be erroneously detected. As a result, a group of pacemaker
markers may be shown on the trace just before the square waves are shown. The pacemaker
pulse detection will be suppressed as soon as the square waves are shown, and will continue to
be suppressed until the erroneous signal is corrected.
Square waves
Warning in red
Override