Datascope System 98 Service Manual page 8

PACER V/A-V
The System will automatically identify and display which of the two pacer
types, Ventricular or Atrio-Ventricular is present. The System triggers on
the ventricular pulse in either case. The patient must be 100% paced and
captured (i.e., no demand pacing). The ECG signal source can be either
patient electrodes or an external ECG signal. Electro-surgical noise
interference automatically suspends pumping and activates "Trigger
Interference" alarm message and tone. The IAB remains deflated until ESU
noise interference stops.
PACER A
The System will trigger on the patient's R-wave without interference from
atrial pacer artifact. The ECG signal source can be either patient electrodes
or an external ECG signal. This mode is recommended only if atrial pacer
tails interfere with R-wave detection when using the ECG trigger mode.
Fixed or demand atrial pacing can be used in this trigger mode.
System 98 Service Manual
Chapter 1, Operation