OSYPKA PACE 203H, Инструкция по эксплуатации, Страница: 71 / 139

PACE 203H – Instructions for Use
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Warning
: Because pacing is interrupted,
the user must be aware that the patient
receives no stimulation therapy and sup-
port by the pacemaker as long as the
key labeled
Pause
is pressed.
The PAUSE function is always opera-
tional, except during application of atrial
overdrive stimulation. It does deploy,
however, during High-Rate standby and
can be used to measure the frequency of
the atrial tachycardia, which assists in
finding the optimal overdrive stimulation
rate.
The determination of the intrinsic atrial
rate can be influenced by the cross
blanking after ventricular sensing. Thus,
sensing of atrial activations can get "lost"
due to the cross blanking, which may
result in a rate determination being of too
low, or unstable. Thus, if a precise
measurement of the atrial frequency is
desired, the ventricular lead must be
disconnected.
If frequencies higher than the noise
frequency (270 ppm) are detected while
the key labeled
Pause
is pressed, the
corresponding interference symbol
(Figure 13) is displayed in the upper dis-
play. The measured frequency is dis-
played, nevertheless, because it may be
a high-frequency tachycardia. Accor-
dingly, for the same reason, the setting
of the sensitivity threshold remains
unchanged (unlike during initialization of
the Auto Sense function).
When no intrinsic activity is sensed in
any channel for 3 seconds while the key
labeled
Pause
is pressed, any measured
values already displayed are erased.
Note:
As long as the key labeled
Pause
is pressed, all other keys and dials are
disabled.