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Pacemaker detection
Warnings
• Do not diagnostically interpret pacemaker spike size and shape.
• A pacemaker pulse can be counted as a QRS during asystole in
either pace mode. Keep pacemaker patients under close
observation.
• The shape of QRS complex may be changed so much because of
the pacemaker that QRS detection may be affected.
• The monitoring of pacemaker patients can only occur with the
pace program activated.
• PACEMAKER PATIENTS - Rate meters may continue to count the
pacemaker rate during occurrences of cardiac arrest or some
arrhythmias. Do not rely entirely upon rate meter alarms. Keep
pacemaker patients under close surveillance. See "ECG
specifications" for the pacemaker pulse rejection capability of
this instrument.
• FALSE CALLS — False low heart rate indicators or false Asystole
calls may result with certain pacemakers because of pacemaker
artifact such as electrical overshoot of the pacemaker
overlapping the true QRS complexes.
Monitoring pacemaker patients
1. Press the ECG key.
2. Select ECG Setup - Pacemaker, and select the appropriate
option:
• Show: Pacemaker spike is displayed on the ECG waveform.
• Sensit: Sensitive pacemaker detection; pacemaker spike
displayed on the ECG waveform.
• Hide: Pacemaker spike is not displayed on the ECG
waveform.
NOTE: If the patient has an atrial pacemaker, ST calculations can be
performed if the pacemaker spike does not coincide with the ISO
point's adjustment range.
NOTE: Pacemaker detection may not occur during the use of high-
frequency (HF) surgical equipment. The disturbance of HF surgical
equipment typically causes false positive pacemaker detection.
NOTE: In Neonatal mode, pacemaker spike is never displayed on the
ECG waveform.
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