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2.3 Monitoring Heart Rate and the ECG Waveform
The trace displays one of the ECG leads. This lead is indicated above the right end of the trace, near the
♥
symbol and heart rate value. Choose the lead with the Lead Select button. Heart rate is displayed at
the right.
ECG displays – The ECG waveform is always
displayed on the upper half of the screen. The
ECG waveform cascades (continues) from the
upper half of the screen to also appear at the
bottom portion when other waveforms are not
selected in Advanced Configuration. The Heart
Rate is displayed above the right end of the top
waveform, near the ♥ symbol. The symbol for
the selected ECG lead is shown to the right of
the Heart Rate.
There is always a scale reference bar shown to
the left of the upper ECG waveform. This scale
bar has a height that represents a 1 mV signal.
The apparent height of the scale bar will vary
depending upon the ECG gain setting being
used, but will always correspond to a 1mV
signal.
Selecting leads - Press Lead Select to change
the lead display. The ECG function can use
either 3 wire leads - I, II, III , or 5 wire leads -
I, II, III, aVR, aVL, aVF, and V. 3 wire or 5
wire lead setting is selected in the Advanced
Configuration menu.
Note: When using 3 wire leads, the ECG lead
set must be set correctly. Incorrect results
and noisy waveforms can be obtained if the
system is configured for 5 wire leads when
using 3 wire leads.
Alarms - When either of the Heart Rate limits
are exceeded, an audible alarm sounds and the
affected measurement flashes. If the Print On
Alarm configuration is set to Yes, this alarm will
trigger an automatic print. You can silence the
Heart Rate alarm, and all alarms, by pressing the
large blue
Silence button at the right side of the
instrument. This will silence all alarms for 60,
90, or 120 seconds, depending on the setting
selected in Advanced Configuration. However,
any measurement still outside the set limits will
flash. When alarms are silenced, they do not
trigger a Print On Alarm.
To suspend the Heart Rate alarms, press the
HR
ALARMS Off
button so the red LED in the
button lights. A suspended alarm will still flash
if it goes outside the range of the limits, but it
will not sound the audible alarm. When an alarm
is suspended, it will not trigger a Print On
Alarm.
Note: The Heart Rate alarm can be suspended
for only 3 minutes when the language setting
is configured to “Francais”. If the language
is set to any other language, pressing the
HR
ALARMS Off
button will suspend the alarm
until you remove the suspension.
If ECG is inactive for any reason, the Heart Rate
display will be dashes “---” and the Heart Rate
alarm will respond to the pulse oximetry rate.
Setting alarm limits –To set the Heart Rate
alarm limits, use the
Select and Set buttons on
the left side of the monitor to follow these steps:
• Press the left Select button to cycle through
MAP
HI and LO, Heart Rate HI and LO,
Respiration
HI and LO (models 622xx or
623xx)
, then (model 623xx) CO
2
HI and
LO.
• Each push of Select moves you to the next
limit. Stop at the limit you want to set. The
measurement and
HI or LO will flash,
indicating which limit is being changed.
• Press the Set button up or down to raise or