ECG and Heart Rate
VF4 Infinity Gamma Series Page 8-15
Displaying Sync Marks
The timing of the sync pulse triggered by the QRS complex can
vary slightly. You can display sync marks on the R-wave of the
electrocardiogram to verify the timing of the pulse.
The monitor displays sync marks as a white line during synchro-
nization. For heart rates between 30 and 250 beats per minute
with QRS amplitudes greater than or equal to 0.5 mV, the sync
pulse occurs within 35 ms of the R-wave peak. See the section
ECG and HR Safety Considerations for details.
NOTE: If SpO
2
is displayed in the first channel and ECG in the
second channel, no QRS markers appear on the ECG.
STEPS: Displaying QRS Sync Marks
1. Click on the HR parameter box.
2. Click on
QRS Marks.
3. Dial in the desired setting (
ON/OFF) and click the knob.
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