CardioSoft - Jaken Medical...

Miscellaneous: Application Tips
Application Tips
General Application
Recording ECGs of Pacemaker Patients
When operating the system in a network environment, periodically scan
the system for viruses. The anti-virus software should be updated on a
weekly basis. Customers are responsible for the installation and
maintenance of anti-virus software.
Check that in the setup menu of the graphics adapter the check box
Center Dialog Boxes is deselected.
It is not possible to display pacing pulses directly in all situations. At a
screen speed or writer speed of 50 mm/s and a pulse duration of just 0.5
ms, the width of the recorded pacing pulse would be a mere 0.025 mm.
When the pace enhancement is enabled (see “Miscellaneous Tab” on page
11-8), a 6-ms impulse with the correct polarity and with an amplitude of
0.5 mV replaces the pacer pulse. Depending on the polarity of the pacer
pulse in leads I and II, the pacer pulse in lead III may be suppressed.
Note
The Cubic Spline and the FRF algorithm cause a signal delay of
approx. 2 seconds; therefore they should be disabled for
adjustment of the pacemaker parameters.
If several adverse conditions exist at once, the possibility of pacer
pulses being interpreted as QRS complexes should be considered.
At the same time, however, QRS complexes might be suppressed
in certain situations. For safety, always watch pacemaker
patients closely.
Recording ECGs During Defibrillation
The patient signal input is defibrillation-proof. Therefore, it is not
necessary to remove the ECG electrodes prior to defibrillation.
When using stainless steel or silver electrodes a defibrillator discharge
current may cause the electrodes to retain a residual charge causing a
polarization or DC offset voltage at the electrode/skin interface. This
electrode polarization will block acquisition of the ECG signal for several
minutes. To avoid this condition, use silver-silver chloride electrodes.
B-10 CardioSoft Revision A
2023324-053