Fukuda Denshi DynaScope 7000 Series, Operation Manual

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Select ON or OFF for “Pacemaker Pulse”.
ON will display the pacemaker pulse in a different color
from the ECG waveform. This will automatically be set to
ON when “Used” is selected for pacemaker use.
OFF will not display the pacemaker artificial pulse.
●
QRS Pace Pulse Mask
For patients using pacemakers, there are cases when the paced QRS may not occur in spite of the
pacing stimulus. This condition is called “pacing failure”, or “failure to capture”. To avoid detecting
pacemaker pulses as a QRS complex, the monitor has a function to suspend QRS detection for a
fixed amount of time starting from the detection of the pacing stimulus. This function is called “pace
pulse mask”.
Signal with amplitude of
± 2 to ± 700mV, pulse width of 0.1 to 2.0ms will be masked as a pace pulse.
But if the pacemaker does not detect the patient’s spontaneous heartbeat (sensing failure), and the
pacing stimulus is applied at the same time as the QRS, this “pace pulse mask” function may
erroneously mask the QRS and cause the heart rate measurement to decrease. To avoid this, QRS
pace pulse mask function can be set to OFF , 10ms , or 20ms for correct measurement of the
heart rate. (default setting : ON)
W A R N I N G
If the QRS pace mask function is set to OFF , 10ms , or 20ms ,
the pace pulse may be erroneously be detected as a QRS complex and
HR/Asystole alarms may not generate due to incorrect HR (counting pace
pulse as QRS complex).
Select OFF , 10ms , or 20ms only if you are sure that pacing failure will
not occur, or when the patient can be constantly monitored.
Pacemaker Pulse
Pacemaker Pulse
Paced QRS caused by
pacemaker pulse
No waveform in spite
of pacing stimulus.
Normal Pacing Pacing Failure Sensing Failure
Pacemaker pulse applied
at the same timing with
spontaneous heartbeat