Instructions for use Zeus Infinity Empowered SW 2.n 209
Monitoring
Pacemaker detection
If pacemaker detection is on, Zeus IE can recog-
nize pacemaker-induced heartbeats. These are
marked in all channels by bars.
Normal ECG impulses are marked by the sym-
bol.
Pacemaker detection is only available in the Adult
patient category.
When monitoring children and neonates or with
high-frequency filter switched on, pacemaker de-
tection is not available.
Pacemaker with impedance-dependent inter-
vals
Pacemakers with impedance-dependent intervals
emit additional electrical pulses. Zeus IE may inter-
pret such pulses as normal pacemaker pulses and
superimposes them on the ECG in the form of black
markings. In this case, change the arrangement of
the electrodes so that the black markings disappear
on the screen.
WARNING
With dual-chamber pacemakers, Zeus IE may
record the second pacemaker artefact as a
valid QRS complex, particularly when the AV
interval is less than 150 ms. A cardiac arrest
will thus not be recognized in unfavorable cir-
cumstances.
WARNING
During cardiac arrest or certain arrhythmias,
the heart rate generated by the pacemaker
may still need to be recorded and counted.
Therefore, do not relay solely on the heart rate
measurement. Special attention must be paid
to pacemaker patients.
WARNING
Do not rely entirely on the displayed heart rate
or respiratory rate for evaluating the status of
a pacemaker patient. Such patients must al-
ways be monitored closely and their vital
signs checked carefully.
WARNING
Some makes of pacemaker (especially exter-
nal pacemakers with electrodes on the sur-
face of the body) emit pulses which may be
much higher than the 700 mV maximum ampli-
tude specified for the pacemaker detection
system of the monitor. For this reason,
Zeus IE may interpret pulses with such high
amplitudes as valid QRS complexes and can-
not recognize a cardiac arrest in unfavorable
circumstances.
WARNING
Special caution is required with patients who
have an implanted, frequency-adapted pace-
maker. Patient monitors can cause faults in
some frequency-adapted pacemakers. This
could lead to unnecessarily high pacemaker
rates.
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