ECG
11-17
Gross results for sample-by-sample detection of ventricular
fibrillation (AHA)
The gross results are calculated as overall results of all records.
Abbreviations:
VEB Ventricular ectopic beat
QRS The waveform presented in an ECG during ventricular depolarization
VF Ventricular fibrillation or ventricular flutter
ST Segment of the ECG between the end of the QRS complex and the
start of the T-wave.
Monitoring pacemaker patients
The monitor detects and rejects pacemaker pulses (see selection Pacemaker in the ECG Setup
menu). Sometimes this may lead to unnecessary asystole alarms.
NOTE: The shape of QRS complex may be changed because of the pacemaker so
much that QRS detection may be affected.
NOTE: 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.
NOTE: 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.
WARNING PATIENTS WITH PACEMAKERS: Do not rely entirely upon rate meter alarms
when monitoring patients with pacemakers. The monitor may count the
pacemaker pulses as heartbeats. In this case, asystole and ventricular
fibrillation may go undetected. Always keep these patients under close
surveillance and monitor their vital signs carefully.
WARNING Impedance respiration measurement may cause rate changes in Minute
Ventilation Rate Responsive pacemakers. Set the pacemaker rate
responsive mode off or turn off the impedance respiration measurement on
the monitor.
Test Gross
VF Sensitivity (duration) 99%
VF positive preductive accuracy
(episode)
100%
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