GE HEALTHCARE B20, User'S Reference Manual

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B40/B20 Patient Monitor
11-12
Pacemaker detection
Safety precautions
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.
NOTES:
•
Pacemaker detection is always on.
•
The shape of QRS complex may be changed because of the pacemaker so much that QRS
detection may be affected.
•
If the patient has an atrial pacer, ST calculations can be performed if the pacer does not
coincide with the ISO point’s adjustment range.
•
Pacemaker detector may not operate correctly during the use of high-frequency (HF)
surgical equipment. The disturbances of HF surgical equipment typically cause false
positive pacer detection.